The 9600/200 was a 604e-based machine more or less the same as the 9500 — only a later iteration, and thus modestly improved over the 9500. I think, for instance, that its cache was expandable, and that you’d be far likelier to get a 233mhz 604e card (rare) running stably in it than you would in an early 9500.
A Kansas machine ran a 604ev processor at 250, 300 or 350mhz, as I recall. The 604ev was smaller than the 604e, was cooler-running, and had an integrated 1mb cache, among its refinements.
One advantage of the 9600/200, however, is that it allows experimentation with dual processor 604e cards. No workie in a Kansas board, so far as I know.
I’d jump at a 9600/200.