I think it would have been a competitive match but I’d favor Lewis to win. Bowe fell into the mold of a large, slower moving heavy with limited defense and Lennox generally had his way with that type of fighter.
I remember following his title winnig victory over Evander Holyfield that Lennox Lewis referred to to Riddick Bowe, as Chicken Bowe. Tough fight, but Lewis would prevail by a close decision. Riddick had too many things going on in his head, Lennox was focused and hungry. Those two components, plus conditioning spell the difference in a fight of this magnitude.