Butterfly contracted top pros and butterfly sponsored pros for example are different.
Butterfly has thousands of sponsored players, and maybe few hundred contracted players (Butterfly pays them money to play with Butterfly).
Contracted players can get customized equipment.
Blade is more common, since each player's technical requirement is pretty much different.
From rubber standing point, there is only "so much" they can tweak.
Butterfly rubbers are already pretty high quality, but for example, T05 Hard has been "in the (pro) market" for years in T05 with customized harder sponge. T05 Hard came out only recently to fit the commericial market.
Specs on the sponge is probably the biggest different tweaks from Butterfly rubbers.
When comes boosting, each player does they own thing.
So sponge thickness customization can also come into play here.