They are very similar. In fact, at Holland Marine, they usually sell the Cookmate with Origo potholders. The Origo uses rubber capss that cover the entire burner can when not in use and prevent evaporation, the Cookmate uses a little disc of rubber that is squeezed between the upper level and the burner can when closed to stop evaporation.
Here in Toronto, the Origo is roughly CDN$100 more and the Cookmate comes with a bamboo cutting board standard.