No, FSI not BSI. Canon says it's a 'new' 32 MP sensor, but strictly speaking they rarely
don't say that. There were many 'new' 18 MP sensors over the years. A small tweak in the CFA spectral tuning, a slight tweak in the underlying architecture, a slight tweak in the AA filter, that's all it takes for 'new'. I wonder if the R7 uses the improved AA filter design (16-point lowpass filter) found on the more recent FF sensors. That would be nice. Knowing Canon, I suspect it doesn't.
FSI means a slower readout speed and the rolling shutter effect that comes with it. This is from the TDP p/review. Every volleyball I've ever used is spherical. With the R7, not so much...
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