In article <43vp2m$hlo@newsbf02.news.aol.com>, kwades@aol.com says...
>What is the difference anyway? Dumb question, sorry...

Not a dumb question, but many out there will think my answer is
pretty dumb.... If you are refering to T-Max 400 compared with Tri-x
(400), here goes: IM(NS)HO, TMY was Kodak's attempt to sell us (dumb)
photographers a film with a lot less silver in it, thinking that we
would trade off the resulting finer grain and better sharpness for the loss of shadow detail that removing the "fast" grains entailed. When
we noticed that the film was (at best) only about 200 ASA, and lacked
anything even beginning to resemble shadow detail, Kodak introduced
(expensive) T-Max developer! Aside from the poor tone quality this developer produces with conventional films, it was able to bring TMY
up to a semblence of a 400 speed film, but at a cost in grain and sharpness. (The processing is also a bit touchy for my taste - and failure is too close at hand, should one inadvertantly vary time, temperature, or agitation slightly.) You may have guessed that I think
the T-Max products hype was a great departure for Kodak from their previous accurate and conservative photo materials ratings. (BTW,
if you do not need to depend on getting results, TMX at 40 in D-76
and 80 in Accufine can be VERY nice.)
Hope this helps.