What a coincidence. I've been listening to Cacophony for the past hour or so. My favorite band.

Although it is up for debate and I don't want to ruffle anyone's feathers I think
Jason Becker was definitely the better player. His sweeps and alt picked runs just seem so much more fluid to me over Marty's playing(atleast I can hear a difference). It's really hard to get it out in words but there's just something about his playing that makes him seem better in my opinion. Both of them also have some amazing solo work so i'll give Marty some more credit there. But Becker still amazes me to this day as to how he could be so damn good when they made Speed Metal Symphony(he was 16/17).