Tony the Tiger will come along and beat them both because he's greaaaaaaat!
Vexx's Picture Can Be Posted In His Article
And Rath Wins
definatley rath he can do siri-ous butt kickin' and cosmic drop
It's a draw! The DNA signatures in the Omnitrix are samples from the superiority of that species, so Rath would be the ideal winner. Although, Vexx has been an Appoplexian much longer than Ben, and for all we know Ben hasn't even come close to Raths capabilities. Vexx also appears to be more ruthless, giving him another advantage.