I looked at ebay and they both look the same to me.

The only thing I would suggest to you is to get the model that comes with the caddy and the remote.While the caddy is a bit flimsy, it still helps to store and move the dolphin around.The remote is excellent for spot cleanups.

I didn't see the remote model on ebay right now, but it does show up from time to time.

By the way, you'll love your dolphin!