hammond pro alpha

Hi O!
     I have a sheet of Hammond Pro on a bat (not my main one) that sees alot of use. Been using it for about 3 months now and it is still good. Been speed glued about 10 times but now use it without.
     I practice alot with it and then use my Joola Rosnet Air for games. They both have the same throw angle and play the same but the Rosnet is slower with more control.
     The more I play, the slower the Pro feels, and soon I might just switch to Hammond Pro. The Pro isnt slow because it is worn out as I have a third bat with Pro on it that only has been used a month and plays the same as the older stuff.
     The older sheet does have a strange pattern developing on it but dont seem to affect play yet. It is kind of a sheen in a leangth wise direction.
     The Rosnet seems to slow down after 2 months of hard play. I think the sponge goesaway, I hit and loop hard.