Definitely slightly stiffer, and according to TW's RacquetFinder, slightly lighter (11.9oz strung vs. 12.2 for the M-Comp).
I have no idea why they priced that thing so high, though. I know my last couple M-Comps cost me ~ $79, so even if I did want to return to that racquet, I couldn't justify paying $130 more for practically the same frame.
However, apparently they are coming out w/ BX2 versions of the lineup, so maybe they'll start discounting the old ones?
"Nobody beats Vitas Gerulaitis 17 times in a row" -- Vitas Gerulaitis, after beating Jimmy Connors on his 17th try.