I'm planning the Moog One as well later (once the tuning in the lower octaves is sorted.
Moog came up with a tuning routine that worked the "bugs" out of the lower register tuning issue a while back. My opinion is that the new tuning (that you can turn off in the settings menu) made it a bit sterile sounding, but if you know how to use the mod matrix, you can add back some "slop" and then the thing is just plain glorious. The One is absolutely my desert island synth today.
I should have said I already had a Moog One. I've got a brand new Moog One 16 before Christmas.
But after 4 weeks I've sent it back with a heavy heart within return period.
It was a difficult decision and not easy to send it back...
I'm my view the tuning is not fixed. Moog came up with a work around. There is a calibration routine which measures all 48 OSCs and stores the deviation on the voice boards. Once you activate tuning compensation the OSCs are tuned in realtime. At least this is my understanding how works. With compensation the tuning is perfekt but I could hear it working in the lower notes. Don't know you to describe how it sounds (slight warble?). I did not use it. Sounded better without.
The latest firmware upgrade was 06/2020. I don't know how it takes to get this sorted. The synth is on the market since 2018. The noise floor (master volume over 1 o clock) and the 5 fans also bothered me a bit.
But the sound, flexibility and user interface is superb!!!
i really miss the synth and contemplating if/when I should buy one again. Maybe after the next major firmware upgrade or even a hardware revision (I guess this will not happen)...
The P10 and the other hand was love from the beginning. I knew from the first second this is a keeper.
I think these 2 synths are too different to compare. If the primary focus is a straight forward raw, full vintage tone the P10 is the better choice in my view.