@@SpottsMusic - thanks for a quick answer! I've checked what Roland said on their webpage, and here are the responses: - 601: SuperNATURAL Piano delivers the authentic sound and interactive tonal response of an acoustic grand piano - 603: Uses the latest SuperNATURAL Piano Modeling technology instead of conventional sampling for a far richer, more expressive piano sound Now, I've checked and it turned out that SuperNatural is a marketing trick...very NOT nice Roland...It seems both are SuperNatural, but PiANO is just a hybrid (samples plus some modeling) and PIANO MODELING is in fact modeling...If you speak to them, please mention that this confusion once discovered can loose them the clients, not gain to be honest. I don't know about you but I feel like I was just 'kinda lied to'. "SuperNatural Piano Modelling = 100% modelled. SuperNatural Piano = Hybrid (sampling + some modelling e.g., resonance modelling)" - forum.pianoworld.com/ubbthreads.php/topics/2758653/question-about-roland-sound.html. But thank you for posting that out, I would never ever spot a difference.

SpottsMusic they do indeed, it's amazing, thanks for replying

Yes, pha 50, 3 sensors