As far as Stengle vs Moore one is an up the ground forward flanker, while one is more of a stay at home forward pocket. Their stats reflect their different roles. But with small forwards I think you should look past pure stats. Stengle is easily the most deadly crumbing forward pocket in the league, while Moore is the best creative link man (who still scores plenty of goals).There's a lot more than this to factor in.
Dylan Moore is the better defensive player than the two ahead of him - both in terms of tackles and pressure acts, he's the better ball user, he's second to Toby in terms of overall team score involvement % and he's doing it in a forward line where he's competing with Connor Macdonald, Jack Ginnivan, Nick Watson and at times Luke Breust. That means that both Stengle and Greene are the more targeted players and get more opportunities. He's also higher rated by Champion Data for whatever that's worth.
In terms of me being a bit biased, I also think he's harder working than both and pops up in important moments as well as Greene, definitely better than Stengle.
We've been brain washed into thinking they must compete for the same spot, when any high functioning team would have both: Moore on the HFF, and Stengle in the FP. But of course AA sides "need" 3 midfielders taking spots in the forward line and almost every spot on the bench.
Imagine if instead we actually picked the best 6 or 7 forwards in the league, in a way that would make the most damaging forward line possible.