I was afraid this was going to happen. Basically Ranger School is a school. Anyone in a combat mos can go to it. 82nd, 101st, SFG, 75th, etc etc. They complete the school; they wear a Ranger tab. They go back to the unit they came from.
Ranger Regiment is a unit, not a school. Graduate RIP, you wear a scroll and go on to do all the things involved with being a member of the 75th.
Media:
This would be the 75th Ranger Regiment. The 'Army Rangers' noted above are not random joes from various units coming together to form a coalition of tabbed individuals, it doesnt work that way.
Ranger School is a leadership/ patrolling course that basically sucks balls; it's a gut check. Since it's called Ranger School, graduates are referred to as 'Rangers'. The school really has nothing to do with Ranger Regiment other than its history. Ranger School and Ranger Regiment are night and day. I really don't know how else to explain it. One's a school, ones a special operations force.
I thought that was a pretty good Synopsis! RLTW Boon