WOW!!!! Mario & Sonic finally together!

[madman]

Well, blast processing isn't a real technical term, it's just a marketing phrase.  The 68000 on the Genesis ran at about 7.6mhz while the SNES's 65816 ran at 3.58mhz.  Of course, CPU speed alone doesn't determine anything.  The other technical reality of "blast processing" is that the Genesis was able to render one frame of video while displaying another.  This is common in consoles today, but was not something the SNES was capable of doing.