Yep I also could be wrong and the better screen is the less brighter one with better colors... but thats not very probable... the better screen should be the brightest with the best colors... the brighter the screen the more real life the colors normally.
I'll have to do some searching.. but when I was researching to buy my 17 MBP I was debating to go Glossy or Matte. I ran across a few threads and in it two professional photographers debated the topic. Both were stated for the best color reproduction they never used "full" brightness as it washed out the photo's and were not realistic.
I get you prefer a "bright" screen, but I don't think your going to find Apple recalling displays based on customer preference. I also don't believe you will ever be happy because if you find a "brighter" 17" that is "brighter" than your 15" then you will complain your getting shafted on the smaller one... and the circle of "omg Apple's screwing me" continues.
Not saying your wrong as everyone has their opinion and preferences but in the end I think your looking at likely two different manufactured screens running on two different power sources... they likely will never match exact.