I think we are comparing apples and oranges. It will very much depend on the modifications and the conditions of the Technics and the Studer. If Bottlehead has done their full mods to the Technics, including replacing many of the tape path parts and using JFR heads for the playback of the 2 track (and replacing the record and erase heads with dummy heads) and eliminating all Technics electronics (even the counter which produces noise), and you are comparing with a stock Studer which is well used, then it will be very different from a stock Technics which just has playback heads wired out vs. a mint Studer with new heads wired out. The prices will, of course, be very different. If price is no object, then I would talk to Greg Baron or one of the people who refurbish from head to toe several different recorders. If price is an issue, then if possible, I would borrow the two machines you are interested in and play with and listen to both and make up your own mind.
My experience is that the condition of the tape recorders makes a really big difference, more than the specific brand when you are getting up to really good 15 ips 2 track machines.
Larry