Not really, I have never noticed it being the higher end model lasting longer. It has been the earlier models with the Rage 128 and 8MB of VRAM (12" 2001 models) that have stood the test of time (thus far). I don't know about the 14" models. The ones after that had the BGA problem, IIRC.
Also, it turns out the 600MHz model I had was from 2002. I double checked the specs (wrote them on a sticky).