Honestly, I've driven the Subaru XV Hybrid, but not off-road. I'm sorry I can't quite give firsthand feedback. I also recall that despite the numbers not being different for the approach angle, the hybrid does have an additional front lip on the front bumper to improve MPG via reduction of aerodynamic drag at the underbody.
However, I too would believe the electric motor on the gasoline-electric hybrid system would assist in off-road performance.
"Why would I want to profess my feelings for some 3D girl?" - Tomoya Aki from the anime Saekano