At their best, the difference between the two is way too small for one being a clear favourite over the other a year from now. Even if we assume that neither will improve, or that we re-run the tape from March, I think this year's Tour would be completely open.
Before the Tour, I thought Pogi wouldn't be able to drop Vingegaard in the mountains. Cambasque was maybe down to drafting before his attack, but Puy de Dôme and Joux Plane were both super impressive and better than what he delivered last year. So while his resounding defeat in the ITT and his crack on Loze made him seem a level below Vingegaard, I think his level this year was very encouraging all things considered.
I think both of them will improve their preparations and performances next year, but I see more upside for Pogi. So I think he'll eventually win the Tour again, it's just a question of time.