I'll say Tyson against Tillis. Ali had been fighting better opposition and had more rounds of experience.
Name some good opponents ali fought leading up to the jones fight. Only reason why I asked this is cause I argue with a friend about this all the time and want to see what you guys think about it.
Archie Moore was older than dirt, but had an amazing experience advantage over Ali and had only lost once in the previous 5 years. Billy Daniels was undefeated and ranked in the top 10 by The Ring.