I have the 16 voice. Never compared the 16 and the 8, my local shop had the 16 in stock and once I played it I fell for the sound almost immediately.
Modulation is limited, sound is excellent, feel is excellent, I love it completely.
Happy to answer any questions if I can, but as you can probably tell from the above you won’t get an unbiased answer.
The 16 I think works out as better value £ per voice in most places, has the compressor, the extra octave, and the dedicated controls for splitting / layering sounds (plus each split is 8 voices!). For these reasons, personally the 16 is a much more attractive proposition. I noticed that some reviewers who only had the 8 got frustrated with creating multi-timbral patches. The multi-timbral patches are a large part of the joy of this instrument for me, so I would find it hard to have to dive into menus to have to access that.
However, funnily enough, when I am carrying the 16 to and from the studio I do sometimes dream about the lighter weight and smaller size of the 8!
Top 3 faults as far as I am concerned:
- No aftertouch generated by the keybed (it now receives aftertouch over MIDI) - obviously not a dealbreaker for me. Personally I find the keybed really inviting to play. If adding aftertouch sensitivity would have negatively affected the keybed then I prefer Korg having left it off. Obviously everything else being equal I would prefer that the keybed generated aftertouch.
- Switches not knobs for a few key parameters (drive, key tracking on the filter, low cut filter) - Actually my objection here is not that Korg fitted switches rather than knobs. In a way, having a simple on / off switch, or a 0 / 50% / 100% switch is liberating from a sound design perspective (no more time wasted wondering whether 49% drive sounds better than 51%!, plus when designing its easier to get back to a previous state of a patch rather than having to remember the exact position of a knob). My objection is that in switching between the states on the switches there is a noticeable click / jump. This means that it would be difficult to flick the switches in a performance without the listener being aware that something has changed in a very glitchy way. It would have been more musical to build in a soft switch / phased transition between the states. Not particularly an issue for my uses, obviously you can work around while recording.
- The user programmable digital oscillators and effects have an incredible amount of potential, and some developers are coming up with really exciting possibilties on a daily basis (check out hammondeggsmusic on youtube for example, just this week he has released an interactive live looper you can upload as a user effect, and a virtual analog style delay). BUT Korg seems to be giving this feature very little support. It is only really open to experienced programmers. If Korg released an app which allowed civillian Prologue owners to design their own oscillators with a more user friendly interface that would be incredible.