Apple - MacBook Air 15 M4 vs Lenovo - ThinkPad X9 14 Gen 1

These two are nearly even on the Mars Score (58.9 vs 59.4). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.

Pick the MacBook Air 15 M4 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are claimed battery life, cpu cores, battery, among others.

Pick the ThinkPad X9 14 Gen 1 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are ram, storage, refresh rate, among others.

Both ship with comparable thunderbolt ports, backlit keyboard, so those specs don't separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.