Welcome!
Maybe a little harsh for a first post.
I would say my post was close-ish...
I don't have a pro plus, not available here yet.
Wiim have stated the dac in a pro plus to be comparable with other dacs up to $500.
I have subjectively compared a pro with a pro feeding dacs of around that price, and higher, of both ess and akm varities.
Although not exactly what was asked for, it's the best I could offer to indicate that, imo, the dac stage in a pro is easily surpassed by external dacs, and thus the pro plus would definitely be the way to go if using the internal dac.
I think it would be amazing if people were not able to infer that from my rambling answer