I was going through the specs and they say it explicitly:

"3 Layers: The PS-3300 consists of three synthesizer units (PSU-3301) and a mixer & utility section (PSU-3302)
Three independent oscillators, plus multiple filters, envelopes and amplifiers for every note on its keyboard, for a total of 147 synth voices of raw analogue power"

So every key has essentially three single-oscillator monophonic voices.

and I just noticed: in addition to obvious updates like MIDI and USB, they added preset memories!!!

I always thought this was the most significant addition to the 700FS and it was somehow underestimated, people didn't comment that much about it. But adding it to this monster is even bigger.

MicroKorg, Kingkorg, NTS-3, opsix wavestate and modwave modules, and now this one...what have they been taking at Korg these days?!? Somebody stop them before they take over the universe!!!