nope "simple" swap
not really an upgrade...
(I dont know turbo numbers so I hope they are TT style items)
try http://www.ozliberty.com/forums/showthread.php?t=1286
FYI I went from original 18/19.. (takes time to read own intro thread).... VF31 Primary and VF27 Secondry
B4 era turbos, usually they are matched 31/33 or 26/27 and there is another combo.... (13/14 are early GT/RS's)