Hi, welcome!
Yep, Manhattan and Mississippi Queen are humbucker size P90s. Stormy Mondays are humbuckers.
So size-wise, all three are the same, they'll all fit the 2017 Faded SG T.
I've had Mississippi Queens in a Faded SG. In that particular guitar they sounded a bit harsh and hollow. I've got them in a Les Paul copy (Japanese Tokai) and they sound and feel much more like P90s in there. But they are slightly more raspy than the real P90s I have in a couple of other guitars.
The Faded SG has Riff Raffs in it and is my "rock machine" now. I don't play it that often because I'm a blues, blues-rock, pop, r&b, sort of guitarist.
My main SG, a 61 re-issue, has Stormy Mondays in it. It's absolutely gorgeous. I'm playing everything on it, the rockier and poppier stuff, and the bluesier and jazzier stuff. I'm more blues than jazz myself, but it really likes the volume rolled off and almost clean jazzy-blues stuff played on it. Think Dickey Betts in the Allman Brothers, especially the sounds he gets on live at the Fillmore East.
I've not tried the Manhattans myself, but I have a feeling they'd be better for blues/jazz than the MQs.
But I personally would choose the Stormy Mondays (or get an SG routed for standard P90s).