Comparing cabs is difficult as few people can really do it in one place/time. It's usually done in assorted venues, over a period of time, AND from memory. The room plays a big part as well, IE what sounded bad here may sound good there. One thing I have noticed is that some of big volume cab manufacturers under damp their enclosures to save money. Some people don't mind or can't notice anything excessive or unusual, while others do.
My first set up was a combo amp. No biggie. When I went to a real rig, I built a pair of BFM Omni's. Hated them. I was really bummed out. I then built a pair of fEARfuls, which I love. (The BFMs were re-appropriated to be just 500Hz bass bins for a horn loaded tube hi-fi system I built, and in that application, they are wonderful.)