In my considerable experience using Office on Mac in tandem with Office on Windows, the Mac experience is severely, severely degraded in comparison.
Extreme slowdowns in large documents, odd crashes, and difficulties handling macros are pretty much the defining experience for Office 365 on Mac for me.
I think this is case of YMMV as I've genuinely not experienced those problems. That said' i'm not crunching through big data sets. Anecdotally, my partner does. SPSS to Excel and back without issue...
In my considerable experience using Office on Mac in tandem with Office on Windows, the Mac experience is severely, severely degraded in comparison.
Extreme slowdowns in large documents, odd crashes, and difficulties handling macros are pretty much the defining experience for Office 365 on Mac for me.