I have only tested EZKeys with one midi file extracted from BIAB but I think is sounds more or less the same when played "piano solo" in BIAB as when dragged into EZKeys.

However I had hoped to be able to use it in the EZKeys User Library (I did put a copy in the Library folder). It turned up as an entry in the User Library but when I am trying to use it over my own chords sequence in EZKeys it does not sound good at all. The library stuff probably need to be in chunks in some type of format I would guess.