If the real PCA Chips are true shaped inlays, not mock inlays, then go with the circle, then You have a true shaped inlay (kinda) . That, and the PCA true $1 is a circle, I just don’t see how you could go wrong with the circle.
Slapping a mock shape that seems more intricate (or even AS intricate) as the higher denoms, just adds a touch of “fake” to a set that has no fake at all yet.
If you were using real shaped inlays (you scored some spotted hotstamp THC and gear milled the shapes in them) I would say go for a shaped inlay like the apple or the gear cogs. But I just wouldn’t do the mock on the $1.00 here.
You got some classy chips there man.