I've got a Limited. Can't help you on the seats, since I only drove a Limited. Not sure if they insulate the Limited more or not. Would stand to reason. As far as the radio goes, the non-Sony radio is terrible. Spoke to the owner of the dealer where I bought mine, he said a lot of people test drive an SEL and listen to the radio, then drive a Limited, and listen to the radio, and they buy the Limited based on the radio. Of course, that is anecdotal evidence at best, and merely reflects opinion.