There isn't a hidden patch, simply FoV is considered an update of ED.

ED fresh install (UK) -> v1.0.13.67
ED + Patch 1.03 -> v1.3.13.100
ED + FoV fresh install -> v1.4.9.39
ED + FoV + Hotfix -> v1.4.9.43
ED + FoV + FoV Patch 1 -> v1.4.9.65