2nd generation ipod for mac

someone please refresh my memory. i seem to remember that apple made two different versions of ipods then, one for windows and one for macs. and that the one for windows shipped with musicmatch software on it. here's where my memory gets fuzzy. i seem to remember that macs could use either one but that for windows users they had to get the correct one. or was it the other way around? i may get one of these things. incidently i have a mac.