The 750 Bandit was a Japanese market only bike. They do show up in other countries where gray imports are allowed - like the UK, Oz, etc.
The only specs I could find on the B7.5 are for the '96 model. I doubt there were any changes for follow-on years though. The power specs for the '96 Bandit 750 are 77 hp (57 kW) @ 9,000 rpm & 6.5 kg-m @ 7,000 rpm.
FWIW - the '96 B6 puts out 77 hp (57 kW) @ 10,500 rpm & 54 Nm @ 9,500 rpm.
The 85-91 GSX-R750's put out 106-120 hp @ 10,500-11,000 and 64-68 Nm @ 6000-7000 RPM depending on model & year.
The '98 GSX750 Inazuma (same engine family as the Bandit) put out 86 hp (63 kW)/ 9,500 rpm and 67.1 Nm/ 8,500.
The '98 GSX750F Katana (again, same engine family) put out 92 hp (67.2 kW) @ 10,500 rpm and 64.70 Nm (6.6 kg-m) @ 9,500 rpm.
(Specs courtesy of
http://www.suzukicycles.org/index.html )
Differences between your Bandit motor and the early GSX-R would be cams, lower compression & smaller carbs. The early GSXR 750's came in two versions, long and short stroke. The Bandit, Katana & Inazuma are based on the long stroke version. The most powerful of the first generation GSX-R750s, the 120 hp limited production 89-90 GSX-R750R (Double-R) was also a long stroke motor.