The "only" reason why BRS gave the CC Gen 2 that recommendation is because they prefer the blue/windex/AB+ Blue look. That is the only reason.
Their reasoning: In order to achieve the "brs" recommended look they needed to dial back too many LED's (white) which in turn reduced the total PAR. Therefore performance, par, and dollar it didn't make sense. Lower light level corals (soft, lps) require less par thus their recommendation.
It is very important to note this when considering using BRS data. They have a certain spectrum, look, they prefer and try to match that with the LUT (light under test). This will skew the results if the light isn't designed to meet a certain spectrum or a single package providing more options for the hobbyist.
TL; DR - If you are looking for a more natural reef light, appearance, spectrum nothing will beat the Gen 2. If you are looking for ATI blue, blue plus, or similar blue spectrum then the Gen 2 isn't for you and would be a waste of money.