hmmm.... I wonder if my yoke will fit over my Blue Steel valve. I've never used anything but DIN with it, but I was on a liveaboard last year that I took it on and they screwed the Yoke insert in and filled it every time with a Yoke connection.... so it does work some of the time...
I can't say that I like the Blue Steel valves as much as I do a Thermo valve though. but not enough to spend $100 plus bucks swapping two of them out. (BTW... the Blue Steel valves are actually made by San-o-sub, in case you'r wondering).
If you have to purchase new ones, consider the XS Scuba valves over the Thermo valve. It has a few positive changes in the crush-bonnet, the number of turns to turn it on and has a hex dip tube so you can use a wrench to put it on. Other than that it appears to be an almost exact copy of the Thermo Valve.