As a long time (15+yrs) user of both. FLS has better ergonomics in a lot of places. Especially piano roll (slide MIDI notes) and arrangement view (automation as standalone clip). Plus the razor tool, my god...
FLS doesn't have a max for live equivalent, but I'd guess 90% of people don't use MFL. The edison recording workflow is hot trash IMO, or else I'd pretty readily move back to FL.
