Here is my current Teapack man collection. I'll keep this updated as I progress with it.
I am in talks to get light an dark blue MUSCLE versions soon. I'm always looking for additions to the collection, including doubles!
I am pretty sure all the information below is accurate, but please correct me if it is not. I still have no Cosmix versions.
The picture shows from left to right:
Front Row
M.U.S.C.L.E. - Flesh, Green, Orange, Purple (Fairly hard plastic.... everyone knows MUSCLE, standard size)
Exogini - Blue, Translucent Orange, Flesh (Smaller than MUSCLE, a bit softer)
Keshi - Green, Red (Much softer than MUSCLE, standard size)
Bootleg Keshi - Red (Feels the same as Keshi, just smaller. same size as Exogini)
Gashapon Bootleg - Green (Standard size, harder than Keshi, but softer than MUSCLE)
Back Row:
Deka Keshi - Flesh (Obviously larger, unique sculpt)
Popy Keshi - Blue (Smallest, unique sculpt)
Bootleg?? - Blue (Arms open like Popy Keshi, but different sculpt. only one with cup handle on left side)