i own both
the kingtuk has a harder "dual layer" leather with a seamed edge and smooth back, also has nice hardwear that doesn't mangle the leather up if you want to adjust the cant and ride height.
the supertuck is more expensive but a softer leather altogether with raw leather back, no seams and adjustment hardware isn't quite as quality and can shred the holes if you adjust too much.
the crossbreed supertuck leather 'broke in', the kingtuk formed my hip but is more stiff by far compared to broken in supertuck.
the kingtuk comes with the leather back shaped with 'combat' cut, crossbreed supertuck this cut near the top of the holster for better frame aquisition costs additional(last i checked).
they both draw and reholster about the same( i never truely tested the two one right after the other). after wearing both even though the kingtuk is stiffer it still 'disappears' after i minute or two.
nothing against the comfort of a crossbreed but the kingtuk is $50.00, come-on!!!!!!! thats a deal.
P.S.- I conceal my XDM compact 9mm and am medium framed 5'11 175lbs, hard to conceal with a teeshirt. hopefully they release the single stack poly pistol soon.