Which keyboard should I choose?

Which keyboard will be better to work with MPC One, which has better compatibility?
Akai MPK Mini MK2 or Arturia Minilab MK2
I mainly work in standalone mode, but sometimes I also run MPC Studio.
Does MPK Mini have any advantage over Minilab because it is from Akai?
Is the functionality of the keyboard build in software is the same 1:1 and the difference is only in the number of knobs etc?

At a high level they are both pretty feature packed... so you're probably not going to go wrong with one over the other.

The problem with your question is that which one is better is mostly subjective. Tell us what you want to do with it and somebody might be able to say "yeah this one is great" or "avoid this one".

Arturia keystep

Ok finally I chose Arturia because:
-more knobs
-360* knobs
-two clickable knobs
-larger and more sensitive keys
-8 internal memory midi presets (for other daw/plugins also) run with a shortcut (shift+pad)
-more software (being MPC user I already got MPK plugins)
-sustain/mod touchbars instead joystick
-different velocity sensitive pads (something new in my desk)

Minilab mk 2 is a nice small keyboard with knobs and pads etc and works well with the MPCs. I also recently bought the 37 key Korg Microkey Air 2 and would also recommend this if you are just looking for a mini keyboard with really nice key action (plus it can connect via bluetooth).