MIDI definitely has more editing possibilities. I'm a MIDIot fossil from WAY back...

But to recap previous posts, plus a couple of additional thoughts...

Melodyne Studio can edit individual notes in RealTracks. Not the same as MIDI, but tasks like changing chord lead voicing or otherwise fixing a note in a chord are super easy and transparent.

If you find a RealTrack you want to edit, you can TRY editable RealTracks, OR you can move the BiaB MIDI chart to a MIDI editor and do whatever you want with it. Works best with keyboards in my experience.

RealTrack acoustic pianos often sound "blurry" to me, probably due to (tiny) audio stretching artifacts. Definitely try the MIDI chart tip above for those if you're not happy.

BiaB MIDI guitars NEVER sound ok to me, especially strummed acoustics. There are some other programs that do these better than BiaB. But unless you have one of those, stay away from BiaB MIDI guitars. (That's not controversial, is it?)

DC Ron
BiaB Audiophile
Presonus Studio One
StudioCat DAW dual screen
Presonus Faderport 16
Too many guitars (is that a thing?)