Comment by jeroenhd

Double check the SoCs. The base model MacBook Air has a slower GPU than the base model MacBook Pro and the upgraded MacBook Air. When shopping for Apple products, you need to compare every number on the spec page individually because Apple is scared of model numbers.

For a while, some MacBooks also had slower disks because some capacities used one NAND chip while others used two. I believe they stopped doing that for their latest models, though. That kind of fuckery means you need to look up benchmarks for each individual model, because the performance differences aren't clear from the product description.