What cam to use in a 318

I've never understood at what point an "RV" cam isn't an "RV" cam anymore. Or where one starts being an "RV" cam.
I always thought people generally meant cams with decent idle, vacuum and didn't mess with idle-2500 rpm torque (power) that much, whatever that maybe for your engine probably around 200-215 intake duration.
It's just such a vague description. I think 3/4 cam is more specific. lol
People like to categorize/generalize.