are 928 gts and 965 turbo calipers the same thing?

[pantswagen]

http://www.cannell.co.uk/images/944%20Technical.htm

-so no
-911 mount to the front

928 gts to the rear

-ie you could swap them but the clip hinge is wrong

-now stock it says the discs are 322 by 32
911 £107 -drilled
928 gts -£130

v6 cayenne 330 by 32 -hat 68.5 -£46
-so stock 964, would clear a 16 incher -with the hat at 80mm
-i go out a farther 16mm, and come out 12mm
-will i hit a cup 2 et55 -7 by 17
-or do i just stump up for the gts