Let's not get all twisted up here. Do not confuse scoring criteria with how to fly a figure. The judge could care less about HOW you fly something. All they care about is how what you fly compares to the scoring criteria. Which for a snap roll are:

1 - The aircraft MUST stall
2 - The nose MUST depart the line of flight in the proper direction of the snap (towards the canopy for positive snaps, towards the belly for negative snaps).
3 - The aircraft MUST autorotate. This really means that the plane must rotate faster than it could by control input alone.
4 - The Aircraft must complete the proper number of degrees of rotation
5 - The entry and exist lines must be parallel to each other. Displacement during the snap roll is permitted, but the lines before and after the snap must be parallel.

These are the same for all snaps regardless of the number of degrees of rotation or the line of flight (vertical, horizontal, 45 degree).