He’s near the top of the division but he’s won one fight at 205 against another ex middleweight? Santos is a gatekeeper, he might beat Manuwa because Jimi has a terrible chin but he won’t be a contender.Santos has been on a tear. IMO, he's now near the top of the division. Scary dude.
Santos is not that young either - 34. He was KO'd by Branch of all people few fights ago and Smith was lighting him up as well before body kick. Low level opponents made Santos look better than he actually isManuwa will be 39 in a few months and he lost 2 striking matches in a row, one by KO and one by DEC, Santos hits hard and could have his resistance improved now at 205.
I think Manuwa does have better hands, but Santos kicks like a beast and will probably have the grappling edge. I don't bet, but i'd stay away from Manuwa.