Zowie EC2-A or ZA12?

[ryanmm]

I need a mouse and I like both of them.

 

[nkkelol]

I own both of them and it just comes down to what shape your prefer more, they're the same on the inside.

 

[ryanmm]

I own both of them and it just comes down to what shape your prefer more, they're the same on the inside.

I heard that the EC2-A's side buttons are kinda bad. How are they?