RA has more "euro" style power delivery which IMO is way better for most riders. They might feel a tad slow or not exciting compared with a peaky oriental, but the stop watch generally tells it differently. Husky went the other way with their 250 MX'ers in '82/'83 to "compete" with the Japs & were bagged for a peaky, narrow power band, expert only style engine, go figure. I personally don't like R/RZ engines but quite like the RA. I am just a fat, old, bald, average Joe though, so maybe Mr. Honda got it right by tailoring for the many rather than the few with the RA250.
K