Goku and Piccolo Jr. at the 23rd Tenkaichi-Budokai are already several-fold above Piccolo-Daimao. At the beginning of DragonBall Z they were much, much higher even so I doubt 10x'd be enough. I'm not even sure if he could defeat 23rd Tenkaichi-Budokai Goku or Piccolo Jr..
Daimao at this point is probably slightly weaker than Kuririn so a power level of 200 should do (by BOZ''s sloppy numbers that is) so Daimao one-shots.
Both of these two are so close that it would go to skill, but who knows who's more skilled? Neither one seems that experienced with even matches. I honestly have no idea who would win. Damn, I wish someone would animate this fight now...