I have the authentic BF versions of both. RM7=Rouge, RM9=Vector
I have 1 Rouge and 3 Vectors, so...!
I first had a BF Rouge clone (not Rob's), the airflow could never be dialed down enough, the AFC was 'leaky', even if completely closed. The authentic Rouge can be tightened to fully closed(I've since started enjoying more air).
I've never tried the RM7 though.
The Rouge has excellent flavor, and decent airflow. If you like big air, fully open might be too little.
Builds aren't too hard on the Rouge, although I found the negative posts to be a little finicky to mess with.
The Vector, I absolutely love it! Little air, big air, whatever you want!! I'm no cloud chaser, but I like a dense vape with plenty of flavor. I get this with the Vector.
Trick is getting coil position right, which is actually very easy to do.
Another thing to consider with the Vector/RM9, is that the top cap does not accept standard drip tips, which has been just fine for me as I like the mouthpiece in this cap. Takes a bit to get used to, but they are smaller (I believe) than the chuff style.