Forge and cards in multiple sets...

Heya all,
I was wondering how does forge choose which set to pick a card from if that card is in multiple sets? Is each card a different "object" from its brothers in different sets?
Thanks,
Tim
I was wondering how does forge choose which set to pick a card from if that card is in multiple sets? Is each card a different "object" from its brothers in different sets?
Thanks,
Tim