If you are looking to see how BRL-CAD stacks up to AutoCAD, I can save you some trouble: There's no comparison. BRL-CAD is more like a back-end program: it can do anything you want it to, but you got to tell it everything from a command line or from scripts. You won't get anywhere without reading the documentation, cause startup is not intuitive. Using it doesn't get any better, in my experience.
I'm as disappointed in this as I expect you are: how I wish there was a good substitute for ACAD, especially the way they keep forcing obsolescence on releases. I think QCad would be a better way to go if you want something ACAD-like. QCad is commercial software
, but at $30 US for a license, it almost doesn't matter.