i'm using galaxy s2 plus,an ap set from 1gadget,as far i concern,there are really no different from ori set,apart from warranty issue(u gonna claim from the shop anyway) and firmware(doesn't matter anyway,u can flash any country firmware in samsung device).
but u deserve whatever come from box,which i doubt ur earphone are,suppose to be no different from sme's earphone or charger. you getting a fake accessories i think.