Feel wise they are both fine.
The main thing it comes down to is the switch.
The classics use a standard micro switch, Clicky/Noisy but easy to swap out and replace if need be, They are also considered better for fighters. Also they arevquite a bit deeper than the micro leafs.
The micro leafs are virtually silent and obv leaf style switches. They take a 2.6mm crimp and are better for shmups etc.
So yeah personal choice really.
I have both on 2 separate cabs and they are both good buttons.