I'd trust your brother, my mechanic says the same sort of stuff to me lol, I think its continental belts that ECP sells as well which I've heard are very high quality anyway. It should all be OEM-spec stuff from them so in theory the quality should be the same, its just the parts on ebay I would tend to stay away as there are legit firms on there selling quality parts but there are some that let's just say do no do that...