Wasn't 18k read for Piccolo while he's weighted?
Anyway, Piccolo wins. He's a really smart fighter and wouldn't fall on Vegeta's tricks. But it would be a really nice fight.
Same as said above. Weighted Piccolo was 18k, so Unweighted Piccolo stomps. It also doesn't help that M3 Piccolo can fire a Makankosappo without any charge time.