This top 20 list by The Ring has them both top 10 and next to each other: https://www.ringtv.com/488242-ring-greatest-heavyweight-time/
Tyson rates above Sonny .Tyson ,in a nutshell did more ,was more successful on the world stage. Now we could say that's because Liston started later ,didn't have the fanfare that Tyson had becoming a pro and had the misfortune of meeting a young Fella called Cassius in his second defense .Tyson didn't come across anyone like that early on so had the chance to defeat contender's and thus make à name for himself . But head to head ?Hard hard fight .
Thanks. This is the full list (though note the criteria) https://www.boxingforum24.com/threads/ranking-the-heavyweight-champions.618331/
1- Louis 2- Ali 3- Holmes 4- Johnson 5- Marciano 6- Tyson 7- Lewis 8- Foreman 9- Dempsey 10- Frazier 11- Holyfield 12- Liston 13- Wlad* *Should move higher soon...
I dont see any case for Liston being ranked above Mike. Mike had a longer, more dominant reign and beat better, BIGGER fighters.