Haven't read them, yeah me neither. If you haven't caught on, this is based off the adventures of my OC's in the Pony-verse. So obviously, there are some differences.
Notes and Hard Chord have a better relationship then what we used to see.
Following up that last one, their mother is still alive.
Last one on the first, dad isn't a depressed drunk.
Nova Burst isn't going to be so nervous. Still will, but not as bad as he was as a pony.
Sharp Edge will be more distant.
Not much I can think of. I'm sure you'll see them though.