Johnson. No southpaw advantage for either man, with Johnson being much more durable. I would say their power is comparable what with Adonis actually being a SMW that moved up in weight... I don't think he has any kind of size advantage over Marvin & they're both tremendous punchers. To say Marvin swam in much, much deeper and more competitive division might be the understatement of the young century.
I don't know about this one. I think Stevenson hit much harder than Marvin Johnson. At his peak, he arguably had the best one-punch power in boxing, p4p. Also has a longer reach than Johnson and a mobile ambush style of fighting that might be difficult for him. I could see Johnson walking into big punches as he tries to stalk Stevenson.
I think Adonis would probably stop him. Marvin mostly lost his big fights by stoppage. For all of the crap he gets about his opposition and inactivity, stopping Bellew, Dawson, Fonfara, and Williams is pretty impressive.
Know anything about Victor Galindez, one of the "guys" Johnson managed to stop? How about Prince Charles Williams, who would go on and have a length reign through the 80's where as Marvin was a fighter from the previous generation entirely.
Stevenson KO. Johnson tended to rely more on attrition and awkwardness to overwhelm his opponents; but against a fellow southpaw who possessed more power and better handspeed, there are just too many ways that the swarming strategy can be sidetracked.
Charles Williams wasn't that good (green too) and Galineez was past it. Not sure why so many feelings. Marvin wasn't that durable and Adonis has excellent power and finds ways to deliver it, even if he is a pos of a human.
I like how you didn't even spell his name properly but want to talk to me, and be taken serious at the same time, about an era of boxing that you're obviously not particularly well versed in.