The Small Texas Jack also has a center brass liner/spacer that adds to the heft and strength (ok, maybe only a little). It's a nice touch.
re: kidwholaughs Check out reply #9 above for my recent review of this knife, as well as the link I provide to the other topic where I review the Sway Back.
IMO (obviously) the Sway Back is a cute, new pattern that Case is launching to much fanfare. In reality you're looking at a smaller knife with much smaller blades, Tru-Sharp only, and at a minimum $25-30 more than the Small Texas Jack. The Wharncliff on the Sway Back is nice, but it's a small blade, and the handle length is about 3-1/8" compared to the 3-5/8" S.T.J.
-- Sam