MacBook Air 15 M4 vs MacBook Pro 16 M4 Max
A side-by-side readout for thickness.
Understanding thickness
Thickness is a numeric spec measured in mm. On this metric, lower values are generally better — smaller, lighter, thinner, or less demanding usually translates to a more comfortable or more efficient product. When comparing two products, focus on the percentage gap rather than the raw delta: a 200-unit lead means something very different at the low end of the range than at the high end. Pay attention to the unit, too — manufacturers sometimes quote peak or burst figures that are not sustained in real-world use. Cross-check the published number against independent measurements where possible, especially for performance and battery claims. Finally, remember that a single spec rarely tells the whole story; the Mars Score weighs thickness together with the rest of the spec sheet so one outlier doesn't distort the verdict.
This matchupMacBook Pro 16 M4 Max's 16.8mm is roughly 46% more than MacBook Air 15 M4's 11.5mm (a 5.3mm gap). Lower is better here, so MacBook Air 15 M4 takes the lead in real use.
Other specs on this comparison
See the full Notebooks category for all products ranked by Mars Score.