In depth comparison and review of Lenovo ThinkPad X13 Gen 1 (20UF) and Lenovo ThinkBook 13s G4 ARB (21AS). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
Advantages and disadvantages of Lenovo ThinkPad X13 Gen 1 (20UF) based on its technical characteristics, features, user experience, expert reviews and price level.
robust build quality
excellent keyboard feel
good battery life
compact and portable
reliable performance
dim display brightness
limited storage capacity
no dedicated GPU
higher price point
Advantages and disadvantages of Lenovo ThinkBook 13s G4 ARB (21AS) based on its technical characteristics, features, user experience, expert reviews and price level.
slim lightweight design
sharp 2560x1600 display
solid state drive storage
good battery life
competitive price point
average graphics performance
no HDMI port
limited color options
8GB RAM may limit
DESIGN AND DIMENSIONS | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Product Type | Notebook | Notebook - 180-degree hinge design |
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Dimensions (WxDxH) | 31.19 cm x 21.72 cm x 1.69 cm | 29.7 cm x 21.1 cm x 1.49 cm |
Weight | 1.29 kg | 1.23 kg |
Case Material | Glass-fibre, magnesium-aluminum alloy, polyphenylene sulfide | Aluminium (top), aluminium (bottom) |
Colour | Black | Dual tone arctic grey |
DISPLAY | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Screen Size (Type) | 13.3" - IPS | 13.3" - IPS |
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Touchscreen | Yes (10-point multi-touch) | - |
LCD Backlight Technology | LED backlight | LED backlight |
Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1200 (WUXGA) |
Widescreen | Yes | Yes |
Image Aspect Ratio | 16:9 | 16:10 |
Image Brightness | 300 cd/m² | 300 cd/m² |
Colour Gamut | 72% NTSC | 100% sRGB |
Features | Anti-glare, 170° viewing angle, 72% NTSC colour gamut | Anti-glare, Low Blue Light technology, 170° viewing angle, Dolby Vision |
PROCESSOR | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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CPU | AMD Ryzen 5 Pro 4650U / 2.1 GHz | AMD Ryzen 5 6600U / 2.9 GHz |
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Max Turbo Speed | 4 GHz | 4.5 GHz |
Number of Cores | 6-core | 6-core |
Cache | L3 - 8 MB | L3 - 16 MB |
Features | Integrated memory controller | Integrated memory controller |
MEMORY | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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RAM | 8 GB (provided memory is soldered) | 8 GB (provided memory is soldered) |
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RAM Type | DDR4 SDRAM | LPDDR5 SDRAM |
Speed | 3200 MHz | 6400 MHz |
Rated Speed | 3200 MHz | 6400 MHz |
STORAGE | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Main Storage Size (HDD/SSD) | 256 GB SSD M.2 2280 PCIe 3.0 x4 - TCG Opal Encryption 2, NVM Express (NVMe) | 256 GB SSD M.2 2242 PCIe 4.0 x4 - NVM Express (NVMe) |
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AUDIO & VIDEO | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Graphics Processor (GPU) | AMD Radeon Graphics | AMD Radeon 660M |
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Memory Allocation Technology | Shared Video Memory (UMA) | - |
Max Monitors Supported | 3 external monitor(s) | 3 external monitor(s) |
Camera | Yes - 720p | Yes - 1080p |
Camera Features | IR camera, Windows Hello, ThinkShutter camera privacy | Privacy shutter, fixed focus |
Sound | Stereo speakers, dual array microphone | Stereo speakers, dual array microphone |
Codec | Realtek ALC3287 | Realtek ALC3287 |
Compliant Standards | High Definition Audio, Dolby Audio | High Definition Audio, Dolby Audio |
Audio Features | - | Harman-branded, AI noise cancelling |
COMMUNICATIONS | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Wireless | 802.11a/b/g/n/ac/ax, Bluetooth 5.2 | Bluetooth 5.2, 802.11a/b/g/n/ac/ax (Wi-Fi 6E) |
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Wireless Controller | Intel Wi-Fi 6 AX 200 - M.2 Card | - |
Ethernet Controller | Realtek RTL8111EPV | - |
Compliant Standards | DASH | - |
Features | Gigabit Ethernet via optional Ethernet (RJ-45) adapter, dual stream (2x2) | Dual stream (2x2) |
WWAN |
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Generation | WWAN upgradable | - |
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BATTERY | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Technology | Lithium polymer | Lithium polymer |
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Battery Capacity (Size) | 48 Wh | 56 Wh |
Battery Life | Up to 13.9 hours | Up to 19.1 hours |
Battery Run Time | - | Local video (1080p) playback time (150 nits): up to 19.1 hours |
AC ADAPTER | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Input | AC 100-240 V (50/60 Hz) | AC 100-240 V (50/60 Hz) |
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Output | 65 Watt | 65 Watt |
INPUT | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Type | Keyboard, TrackPoint, UltraNav | Keyboard, touchpad |
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Keyboard Backlight | Yes | Yes |
Features | Spill-resistant, multi-touch touchpad, Fn keys with Unified Communications controls | Spill-resistant, multi-touch touchpad, buttonless touchpad, precision glass touchpad |
CONNECTIONS & EXPANSIONS | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Interfaces | USB 3.2 Gen 1 (Always On) USB 3.2 Gen 1 2 x USB-C 3.2 Gen 2 (supports DisplayPort 1.4 Alt Mode) (Power Delivery) HDMI Headphone/microphone combo jack Dock Headphone/microphone combo jack |
USB 3.2 Gen 1 (Always On) USB-C 3.2 Gen 2 (supports DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) USB4 (supports DisplayPort 1.4 Alt Mode) (Power Delivery 3.0) HDMI Headphone/microphone combo jack |
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Memory Card Reader | Yes (microSD) | - |
SOFTWARE | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Operating System (OS) | Windows 10 Pro 64-bit Edition - English | Windows 11 Pro - English |
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Software Included | - | Microsoft Office (Trial) |
MISCELLANEOUS | Lenovo ThinkPad X13 Gen 1 (20UF) | Lenovo ThinkBook 13s G4 ARB (21AS) |
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Dockable | Yes | - |
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Included Accessories | USB-C power adapter | USB-C slim wall mount power adapter |
Security | Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader, smart card reader | Firmware Trusted Platform Module (TPM 2.0) Security Chip, fingerprint reader |
Security Slot Type | Kensington security slot | Kensington nano security slot |
Theft/Intrusion Protection | Security lock slot (cable lock sold separately) | Security lock slot (cable lock sold separately) |
Features | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810G tested, self-healing BIOS | Administrator password, hard drive password, power-on password, RapidCharge, MIL-STD-810H tested, self-healing BIOS |
Compliant Standards | RoHS, TCG Certified | RoHS, Energy-Related Products (ErP) Lot 3, TUV Rheinland Low Blue Light (Software Solution) |
ENERGY STAR Certified | Yes | Yes |
EPEAT Compliant | EPEAT Gold | EPEAT Silver |
TCO Certified | TCO Certified Notebooks 8 | - |
Max Operating Temperature | 35 °C | 35 °C |
Min Operating Temperature | 5 °C | 5 °C |
Humidity Range Operating | 8 - 95% | 8 - 95% |
Manufacturer Warranty | Limited warranty - 3 years - pick-up and return Limited warranty - 1 year - pick-up and return |
Base warranty - 1 year - pick-up and return Extended warranty - 1 year - on-site |