There's no 100% firm proof that your machine version has to match the version that you want to import the ID from, but you're always better to use IDs from a console version that is either the same or as close to as possible.
And you can talk about Machine IDs & DNA$ all you want over at backupscene.com cos we know more about it all than any other site. There's a lot of myths surrounding DNA$ etc.., but if you want info that's almost guaranteed to be 100% then pop on over to the experts.
Best Source For Your PS2 Needs. Always
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Our Latest IDs: Test Drive Unlimited(PAL), Snooker 2007(PAL), UEFA Champ League 2006-07(PAL), MVP 07 NCAA Baseball(US), CollegeHoops2K7(US), ArenaFootball:RoadToGlory(US)