Exactly. The two Series 1 versions of the M62 flow the same and produce the same boost, it'* just that the 94/95 version spins slower to achieve it, producing less heat. A little more efficient, and a slightly larger TB.
HOWEVER......I can't outlflow my TB on my 93 with a 2.2" pulley and 12psi of boost, so the TB isn't going to gain you much if anything. And you'll have to run an AFC calibrator, which adds a bunch of PITA in the mix. Getting it set right to run WITHOUT causing problems can be tough, and it'* something that may need constant attention, not to mention the cost involved. You'll never know from day to day if you're too rich, too lean, or just right (AFR, not porridge).
My gut tells me the only difference would be a POSSIBLE gain in hp at the very high end (WOT, near redline), and perhaps a slight decrease in KR. And there are other ways to achieve the same thing that are alot easier and cheaper.