As long as they are offering you the same warranty, and have told you its the same model/parts/etc, I would say there is no reason to wait and keep with what they've offered you. One for sure way to know if it is a refurb or not is to ask to see the tub wrapped up in its original packaging the manufacturer ships it in. Unless it's a floor model, which in that case the packaging would be removed but still have the same warranty, and the same equipment inside of it.