Not sure about the specs, as I haven't been following these frames too much so don't know what they are suppse to be.
Both. These days, I'm playing a lot with the Youtek Prestige Pro, BlX 90, or PS 85. However, I somehow always make it back to Wilson.
The grip has basalt strips attached to the pallets. This supposedly gives the handle a better, more comfortable feel upon impact.
Some lead will definitely help. However, if too much is required, I would think it would change the overall feel of the frame.
As for the TY Prestige MP,,,,, they are completely different frames. IMO, the overall feel (on impact) of the PS95 is more thick feeling and cushioned. Also much more maneuverable.
As for some of the other questions, I have not been able to play the 90 yet. I did hit with the 6.1 95 (18X20), which felt super heavy but really solid frame.
As for the foam in the handle, it could give a bit, but the space in there is too tight for moving it around/pushing it aside and adding lead.
BY THE WAY, PICTURES HAVE BEEN SENT!! ENJOY