Really, the difference in climbing tools for SRT are very small and one tool doesn't have drastic differences over the other as far as function. They feel slightly different on the hitch and they both require someadjusting and playing around with hitches. There is very little I can do with one tool that I can't do with another or visa Versa.
The main thing is climbing SRT, that has all the advantages. Little things like switching to ddrt I find better with a wrench especially when using the hitch climber pulley. But that is something I do very rarely. I can descend faster and more accurately on a wrench but that is a feature that would only be useful in a comp where they are not allowed anyway. But truthfully you give me any of the SRT climbing tools and ill be happy as long as I'm not restricted to ddrt.
Definitely can't find anything at all wrong with the HH. It's a beautiful tool as well. The more Srt is made accessible to climbers the better.