The "Fate (EMIYA Version)" changes the assault music to the NP of EMIYA.
The music changed of the EMIYA version is:
Assault: https://youtu.be/UIqXYiI7FFg
The "Fate Nero version" changes the assault music to the Nero ost from Fate/EXTRA CCC
The music changes of the Nero version is:
Assault: https://youtu.be/p1ufysrtZkk