Yes, I as recall from the review, the KRKs did a better job with harder rock n' roll with their bigger low end and softer highs. The BX5s, with their brighter highs and more controlled (lighter) lows, did a good job with other types of less aggressive music.
What the reviewers didn't discuss was how the EQ adaptation switches, of which the BX5s have 4, were set on any of these monitors--probably flat, but a point worth mentioning. The "acoustic space" switch on the BX5 really helped me to shape the sound to my quirky studio space. I'm not sure what type of EQ options are available on any other models tested, but it's worth checking out if you're in the market. (Unfortunately, it hard to hear such subtle changes in a store, which is why I bought a couple of models to compare at home.)
J.