I dunno TYG, when you search T51 on their site it gives http://north-america.beyerdynamic.com/shop/hah/accessories/edt-50p.html as a result. Returns the same when you search T50, so I'd think they are the same... but you never know with these things.
Ok the T51p manual has part # 912603 for the earpad, so it's the same.
Oh man, thanks a bunch!
Ironically, most Counter-Strike and Quake pros use Microsoft Windows Mouse Optical 1.1 or Intellimouse Explorer.
Outside of that, I'm not sure what for example Starcraft/MOBA scenes usually use.
I don't even want to know...