I am trying to purchase the Seagate barracuda SSD but I noticed that across different stores, the Seagate Barracuda 120 SSD has slightly different model numbers, in fact NewEgg has both models listed: ZA1000CM1A003 and ZA1000CM10003. Anyone know what's the difference? It's not only NewEgg, B&H also lists ..A003 model but Amazon 1003. I posted the question several days ago but no one knew the answer for certain. So I try to ask again, hopefully someone could help.