I can’t comment on Tides as I’m not familiar with it’s firmware, though I’m sure someone could go peek in the GitHub repo for it to confirm the SR. JF has different sampling rates for the FM input (super high resolution) and the trigger inputs (slightly lower resolution). The only time where this might be noticeable would be when using a high frequency external oscillator clock source to trigger MANGROVE-style impulse trains or sync sounds in sound modes via the TRIGGER inputs. Having said that, I think the characteristic of the digitized clock stream is actually very unique and musical in a gritty, industrial, rhythmically glitchy way, and is one of my favorite things to explore!
Similar to FLOOM mode providing internal FM-modulators, SPILL uses IDENTITY’s EOC pulse as an internal trigger source for the other oscillators (with retriggering controlled by the RUN voltage a-la shift). When INTONE is CW, this results in Mangrove-style impulse trains, and when it is CCW it results in typical sync sounds.
Edit: as always, I recommend exploring the possibilities sonically as the #1 way of getting a better sense! FWIW I have never noticed any issues with HF FM modulation.