Can you tell me which tree do these leaves belong to - mulberry or greengage tree?

I snatched these leaves from a tree at my old neighbourhood that grew mulberries. The thing is, a nearby tree grew greengages. And thus, I'm not too sure if these leaves belong to one or the other. Perhaps I went to the wrong tree, as the mulberry and greengage trees looked identical to me and were right next to each to other as well. Can you tell by the leaves which tree I'm looking at here?