So many wrongs in one post...
Wawrinka did not play with the PT57A, he played with a special layup MG Prestige Pro (TGK238.3). The Prestige Pro was also 95 sq in stick, just like the 95D. However, Both, 57A and Prestige Pro are VERY different from a Yonex.
Yeah you are right...he used the TGK 16x19, not PT57A. Sorry.
And I know that Head Prestige, even if it's a 98", it's more a 95".
But the long throat and 20.5mm beam of 97 Tour is more similar to Head, than 95D is. The 95D has on the throat 6 main strings, while 97 has 8 main strings, just like Head Prestige).
So, can you tell me why Hewitt also uses the 95D and not the 97?
And, what are the differences in feel and power between 95D and 97?
Which one has a closer feel with the Head Youtek Prestige Pro?