I talked with the man himself, George Young the Stellite 6K King, two weeks ago.
He still swears by 6K because he said its harder than Talonite. If anyone knows George, they know how stubborn he is, and he is not easily swayed. He did enjoy the TNT I showed him, but wasn't so impressed by the Talonite badging on the blade.
I have a 6K kitchen knife George made, and have used it for 1 1/2 years. I have only had to run it down the white stones on a Sharpmaker a couple of times, and even then it was still cutting just fine. I haven't had as much experience with Talonite yet, due to my only having the material for a month now, but it does seem nearly as good.
Either way, they are both great, and are both a pleasure to use.