Hi yes they are similar but not the same, my fathers collection has some of the Sowerby ones which come with a makers Mark and also the cherub and urn ones in several sizes but no makers mark. The patterning especially around the head is different. When I next visit the museum I’ll get some photos.
These are also mentioned in the book Colin lattesmore 19c moulded glass “unknown” still great candle sticks especially green ones. Cheers Mike