Yeah, my SSK is an '87. There's definite differences in terms of weight and key wobble, and the keycaps on the Unicomp are less sturdy.

Plus I do actually have a USB model, and it can be flaky and require a replug at startup. And the pointing stick has different sensitivity based on which direction you're going, which makes it worthless.

Also, I just like the tenkeyless layout.

The benefit to a new Model F is I'll never have to worry about needing to do a bolt mod, and you can actually move the barrels around to a different layout if you want to. Plus, with the XWhatsit controller, you can program it and have layers and whatnot, and bug-free USB. And the case is metal.

The Unicomp stuff is comparable, but I think it's a reach to say it's totally the same.