Not sure if the HDC is faster than a HC. It is listed as the same displacement, but without all the extra cabin and with no inboard engine, the HDC has to be a lot lighter. Plus my Torqeedo only weighs 30#. I was out sailing in moderate winds last year at the same time as my neighbor with a HC, and I sailed right past him, but be had about 5 or 6 people on his boat, and his sail was reefed. I had 2 on the boat and full sail.