I have played others, yes. Architecturally, OB-6 and Prophet 6 are very similar as they share a lot of the same circuitry. They are both great synths, and I am

I have played others, yes. Architecturally, OB-6 and Prophet 6 are very similar as they share a lot of the same circuitry. They are both great synths, and I am sure I'd love a prophet 6 if I had one. But I always perk up when I hear the Oberheim sound, more so than the prophet sound, and I do like very much the state-variable filter, which is not found in the P6. I enjoy making pad sounds with a notch filter, and be able to modulate it's shape towards a LP and a HP filters. Compared to the Virus, the OB-6 sounds more alive when played with a keyboard. It's nuanced when played like this, sometimes like an old piano, where the Virus sounds equally full but very precise, which is great when sequenced and you want a bassline that sounds pristine, for example. I find the Digitone a bit in-between, as you can get pretty creative with the FM algos, and it also sounds very hi-fi.