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With DIN, you can always VERY EASILY add a yoke adapter.
With Yoke, you cannot easily add a DIN adapter.
It is possible to have the yolk converted to din adapter and the reg coverted to Din. Example, I had my scubapro MK25 converted to DIN. I then had the yolk peice turned into an adapter with the addition of a single nut. Now I have a DIN reg with a yolk adapter if needed. The yolk adapter sticks out a bit more, but I do not find it to be obtrusive. I do notice that most poeple sling their tanks too low on their backs. That might make the adapter uncomfortable.