Translating step 24
The Butterfly 2.0 keys are indeed updated! Check this sweet MacBook/MacBook Pro (with function keys) rollover!
The Pro's keycaps (first image) are a little taller at the edges, making keys easier to find with your fingers.
The dome switch under the butterfly mechanism also appears to be heftier and better mated to the keycap than the ones in the MacBook (second image).