These are two (very) different mats, so your post is pretty confusing. Can you clarify? For starters, what turntable are you considering?
turntable mat : boston mat, audioquest sorbogel ma
I spoke to some turntable dealers regarding tweaking there turntable with the above mat. Some are positive about it and some felt that the original platter mat sound characteristic is what the designer intended it to be. what is your opinion?