Digitone is truly polyphonic/multitimbral.
Each voice can play a different sound at the same time (with its own AMPs, 2 filters, 2 LFOs and so on).
Each track has a “main” sound, which is in easy access for editing, but you can place as many different sounds on tracks as you like.
Each sequencer step can be locked to a desired preset, and tweaked if needed.
Patterns are split into those 4 tracks, where each track is like a mute group, and has its own settings for lenght, scale, ect.
I suggest giving manual a read, its really well put together and explains everything very well! Even goes into basics of FM and how to use it.