both versions same. if u get 2.8, u can downgrade back to 1.5. jus that u need the almighty GTA LCS unpatched ( which i have 1 :twisted

. now the best firmware is 3.03 OE-C so if u want to get this firmware, jus go to 1.5 and then use the easy upgrader to 3.03 OE-C. other versions to 3.03 OE-C have risk of making it bricked.