I'm neither a fan of Lewis nor Tyson, though I enjoyed watching many of their fights. So I feel I have an unbiased opinion.

A prime, motivated Lewis would be hard for Tyson to beat, IMO. I stress motivated, because it was a well known fact that Lewis was prone to come in at less than 100% mentally. An unfocused Lewis would be victimized by a Tyson bomb sooner or later, and it'd be nighty-night Lennox. Tyson was definitely better and stronger than either Rahman or McCall, and look at what happened when Lennox came unprepared for both of them.

On the other hand, Lennox had too many physical advantages over Tyson. Taller, bigger....... and with a HUGE punch. Prime Tyson could bob and weave, yes... but eventually he'd have to come inside of Lewis' range, and it'd be bombs away. A focused Lewis would've done a Buster Douglas on Mike, IMO.