Correct on all 3, but realflight 7.5 has almost all the models from the Drone Edition. You probably won't need Drone Edition anymore.
For what it's worth, I play more in the photography field than that flight field, although I've been a flight enthusiast my whole life. I've lived vicariously through RC buddies in that realm, and do understand motor, controller, and battery technology to a decent extent.
I know there are drones, then racing drones and filming drones. I'm fascinated by all three, but am wanting to do what I can with a simulator to get the "right" photo/video drone, right now I'm most interested in the Phantom 4 and Inspire 1. From what I've seen with RealFlight Drone, I'm not afraid of either of them performance-wise, depending on how close the "models" are.
But drone racing/aerobatics/agility flight is something I'll sneak up on with a different bird.
All advice, comments, etc. are welcome and invited.