I don’t know midi well enough to know exactly what it is but in case there’s a midi guru out there who’s too lazy to listen to both files, I’ll describe it. The original file has a drum track that uses the sounds of a basic drum kit: base drum, snare, high hat, cymbals, toms etc.
The exported file has different sounds; a more Latin bunch of rhythm instruments. If I’ve heard it right, one of the toms in the original is a latin “scratchy stick” (don’t know the name.) Base drum in the original is a cymbal in the exported file. The exported file has a police whistle in there somewhere and a bunch of sounds I don’t know the names of.
It could be dumb luck that the the new batch of instruments sounds really good. I don’t know. And I don’t know details about how midi maps notes in a drum track to sounds.
In answer to your other question, I liked it a lot although it may not be for everyone. I envy your talent for dissonant harmony, chromatic melody and unexpected rhythms.