I think I was wrong about Ingram; I thought that he was just a moron who could knock down 3s and had crazy length. He seems to be coming into his own, though, even showing better instincts on the defensive end. His ceiling looks to be a lot higher than, say, in March.
As has been mentioned, Jaylen has incredible intensity and a will to succeed like no other. His body is no slouch either. If a trade happened, I would be disappointed since I have become so invested in him. I don't see a world in which he doesn't succeed. Jaylen is electric - something I don't feel about Ingram.
I don't put much into the age argument. While Jaylen is 'older', they both have had the same amount of time developing at different levels through the years.