you hit on the basics 750. Eventually i may be doing a Katana build after i get a lot of other things caught up so i can share what i know of them thus far. The Katana has milder cams then the GSXR, Dual exhaust instead of 4 into 1, longer wheelbase, steel chassis, Basicly the only thing in common between the Katanas and the early GSXRs is the fact they both share the same oil cooled engine and thats really about it...The Katana kept with the oil cooled engine and the GSXR went liquid cooled..However on the other hand the Katana has a lot more in common with the Bandit since they both used the same powertrain and a few more parts interchange between the two.
katriders.com would be a good source of info for your katana research.