Often calling from SB with a speculative hand is a losing strategy, but here you are very deep, and therefore I dont mind it.
You flopped a 15 out draw, which mean, you are slightly ahead of an overpair, so you are happy to stack off right now. But you also have 6 high, so you have no showdown value at all, and if you can get both opponents to fold and take it down right now, thats a great outcome. And for those reasons I prefer to check-raise rather than just check-call.
Thats obviously a pretty massive bink, and now the question is only, how do you get the most value. As in the other hand, you shared, it makes a lot of sense to lead out, because so often a hand like an overpair will check back now. But its not folding, especially not if it has a diamond. You could also check-raise, and maybe that was your intention. However when he bet full pot, it seems like, he must have something, or he is on a wild bluff
. So because of his sizing I am on board with just calling.
The only reason to check-call the turn is to give him a chance to hang himself on the river, so as played definitely check again.
What a cooler. Nice to be on the good side of it