Mega's are my go to gloves and I've used a few different variations of them... I agree with kingfooj the index fingers feel roomier (that's where the padding is beefed up the most).
As for some other common specs on Mega's that are different:
-Some have a solid beefed up thumb instead of the Franchise thumb... Absolutely couldn't stand it.
-The big padding on the side of the hand (down the pinky) can get a bit annoying if you use grip sticks