Hmmm weird. I always thought Flyin' High was one of the most boring, unplayable heaps of rubbish i'd ever had the misfortune to part with hard earned cash for, whereas Xtreme Racing was a game of such supreme playability that I rated it even better than Mario Kart on the SNES, and I *love* mario kart ;-)
In fact, back in my college days, i'd take my Amiga round to my PC owning friends house. We'd play Doom on his PC for half an hour or so, and then play XTR for hours on end..