The one from the left looks like Kaffir lime. The round leaf. Do they have a strong strong smell when you crush them?
I'm growing several Kaffir lime seedlings too. Yes, the leaves look nearly identical to Ichang papeda with their symmetrically sized winged petioles.
I'm pretty sure these cuttings did not come from from Kaffir lime, not unless a Kaffir lime tree could have survived outside in Portland, Oregon this Winter (took the cuttings myself).
As for the smell of the leaves, they have a nice fragrance, very light, lemony, but with a characteristic deepness reminiscent of Yuzu. (It doesn't have the spiciness of Yuzu though) It smells a little different from Kaffir lime leaves, but similar in the fact that the smell of both is very light and mild, without the harsh smell of petitgrain found in other citrus leaves.
I mean probably mild enough to cook with (like Kaffir lime leaves), though it probably wouldn't add much flavor.