The question is pretty unspecific. Like what? The Core One, the MMU3? I am just going to give a blanket answer: Both are great, though the MMU has been a hassle at the start with the firmware and Prusa not knowing what was going on. Also the official support for the nozzle sizes has been lacking, they are still missing nozzle sizes after two years that I hacked in two years ago and that are working flawlessly.
The Core One (or especially the Core One L now) is a really great printer. Can recommend it 100%. I am just saving up for one.
I will then later use the Core One L with a 10-tool INDX and the “normal” Core One with my 0.6mm HF nozzle I guess.
It’s a kind offer. My understanding of the difference between the two technologies makes me want to go straight to INDX instead of stair stepping through the MMU approach.