Very difficult question to answer. 
You would have to go to some lengths to eliminate source independent differences first. You're already using the same speaker setup with both, so that goes some way. (I'm assuming that you are - if you are listening to two different setups in a store, then you can't compare. The speakers should be the same, and in the same position, when playing both units).
Then you have to ensure that bass/treble/loudness, etc. is comparable between the two. I doubt that just setting them to neutral and loudness OFF on both would mean they are identical.
Then you have to make certain that the volume output is as near identical, down to a "fraction" of a db, as you can get. You'd be surprised by how just one db extra "soundweight" from a setup can have you thinking one plays better than the other.
Now you're set to compare.
Going by my ears, I like both. I once had fun with playing a BV7 with 7.2, set up with two BL8000s that weren't connected, for an audience that thought all loudspeakers were working. They were surprised to learn it was only the 7.2 that was on.