Much better surround--as the QS4s are not direct radiators (ie, you don't get the majority of the sound beaming directly out from the front of the speaker) you get a more diffuse surround field, which is what movie sound editors at least are expecting. Remember that in theatres, the surrounds are often made up of a series of speakers along the walls. That's not practical for home setups, so multipolar speakers such as the Q series or other bipolar or dipolar speakers simulate that.

I am the Doctor, and THIS... is my SPOON!