I know, I've been reading the same thing, and looking at articles about it because I bought a 75GXP. You would think that since it's a higher number, that it'd also be the better one, huh? Anyways, here are the two IBM spec sheets:
<A HREF="http://www.storage.ibm.com/hardsoft/diskdrdl/desk/ds75gxp.htm" target="_new">IBM Deskstar 75GXP</A>
<A HREF="http://www.storage.ibm.com/hardsoft/diskdrdl/desk/ds60gxp.htm" target="_new">IBM Deskstar 60GXP</A>
I think that the 75GXP is better because it is described as an Ultra ATA100, while the 60GXP is described as an ATA hard drive. (Is that the same thing? I dunno...)
Oh shoot...here's what you need to look at. I'm so ticked...
<A HREF="http://www.storage.ibm.com/techsup/hddtech/table.htm#Deskstar" target="_new">IBM Hard Disk Drive Table</A>
You see the asterisk? That denotes the newest hard drive.
There's your answer.