
Whether to open these sort of hands, I think, should be based on purely tactical considerations. Probably, the best situation to open the East hand for 1
♦ would be third seat NVUL early in a match against moderate opposition (it is a perfect Kamikazi 1 NT opener first or second seat). Third seat Vul would be nearly as good. You are hoping to scramble the opponents' information exchange if it turns out to be their hand.
Fourth seat is a different story altogether. You already know it isn't their hand, but it may not be yours either. By opening, you are, in effect, extending the match by one board. Do you want to do that? Do you need to do that? If so, then ask yourself to what degree do you have an advantage?
Well, here your hand here is slightly better than average, and it has spades. This is a slim edge, but an edge nonetheless. On the actual hand, it looks like both sides can make eight tricks in their best suit. Any defensive slip allows nine tricks. If you open 1
♦, the most likely outcome is +110 and 3 IMPs for your side.
The hidden downside of bidding like this is that it makes life a bit dicier for partner whose life would be easier if he knew that pard's fourth seat openers were never sub-minimum. You may miss a close game once in a while.