http://www.purgatorycreek.com/index.html The new PA800 and the T2's pianos are compared on the New Entries page (along with MotifXS), and some other arrangers' pianos can be found on their manufacturer's pages (G70 is the FantomX Ultimate Grand patch).
Apples to apples....
Try downloading a few of the files and listen to them randomly (without knowing which is which). Give your prejudices a rest, and actually just use your EARS for a change....
You'd be surprised by what your ears and not your arrangers logo tell you...