As far as I know, the differences between the deluxe and standard Ponos are purely cosmetic. The deluxe models have a really nice gloss finish, which is much more expensive to apply, and an ebony fretboard. They look a little nicer, but don't play or sound any better. Some will argue that a gloss finish actually reduces volume, but as an owner of a deluxe concert Pono I can assure you that, once it opens up, the instrument is plenty loud. If money is tighter than your vanity, I'd go with the AC.
As for Pono vs. Kala, I'd recommend Pono because I find they have a lighter build that results in a more resonant and acoustically balanced tone. Their necks also play really well. The higher end Kalas are very good, but I do think Ponos are a hair better in both playability and sound.