The "Pro" in MacBook Pro has slowly degraded to "it comes with a fan so that the chip can keep chugging when it gets a hard workload, unlike the MacBook Air where the chip will throttle since there's no fan".
replyScreen, ports too (to be fair I've used the HDMI port about 5 times, and the card reader never).
replyThe base model chip on the Air is binned too - 8 GPU cores on the Air vs 10 on the Pro.