2 cents worth on this one....
AXIA, as staed is a code, now.. i have not looked closely at any Athlon chips, BUT...
i have a Duron, a few K6-2's, 2 celerys, and a intel pentium. one thing is certain, intel don't make it as easy as AMD.. LOL IMHO
anyways, all my AMD's are Clearly marked with codes and it's easy to tell especially on a Duron which code it is. like i said, tho... the Athlons may be different, i kinda doubt it but i dunno.
one tip tho, if you go to a puter show, and tell the guy you want an AXIA ... you just gave him every reason to jack up the price... "Ohhh, the "AXIA" type, yeeeeaaa, i have them.... they cost more tho, cuz they're better"
try to get the guy to let you examine his tray, i've had such luck myself. then you need not tell him specifics, just that you'd like to see what codes are available.
anyways, i hope this helps ya... happy hunting!