Which Tua are we talking? I think Jones could possibly outpoint the fat, slow, piece of shit Tua of the 00s. The 96-97 Tua who was actually in shape, brutally KO's Roy at some point.
Roy would probably look fantastic for s short while, easily tagging Tua and making him miss but at some point he's bound to run out of real estate and get fucking splattered
I'd probably go with Roy too. Tua never really impressed me. If he lands, Roy is going to the morgue though.