Do u mean different between original and ap set or clone set? seriously directd only selling ori and ap set, they gt highly good reputation on both online and retail market.

Otherwise,they let will u know what model before u could consider it.

Bought a galaxy s4 sme be4 from directd, satisfied

There may have several issue happened

let say iphone series, they sell both MY local set and SG set, u may ask clearly before buy it.
They mostly import from sg telco, so need to unbox and activated sim card in sg.

other brand phone samsung, htc ,sony come with sealed sticker box, if u found sealed sticker broken thats mean have been 3rd party person opened box package.

btw those seller have offer 7 days manufacturer return, u dont happy with phone can ask for request to turn back : )