Bah. Those pictures are made by a genius, it's got nothing to do with Tri-X. If he took the M8 and any of the software displayed at the top of this thread -- good or not -- and took the same pictures, they'd still be great.
The results were interesting. I, too, preferred A as a default/"ballpark" 3200 look, but it's clear you can tweak Silver EFX and Exposure 2 to look like one another if you choose. But did anybody go check out that link to TrueGrain? Man, those guys seem to have gotten the algorithms really right. There is an excellent example on the site where they try matching actual Tri-X to their emulation and it's pretty damn close.