I'm not sure I think it should be Cinematic Studio Brass vs CineBrass - they are two different libraries.
When I am using Cinesamples libraries I get into a groove of sorts, and their articulation management approach makes complete sense. Then I spend time away from them and it is confusing again, but eventually I get back to it.
On the other hand the entire Cinematic Studio series is just dead simple to use, probably my favorite in terms of ease of use, but that comes with a price, of sorts - you are slightly limited in the articulations that are available. It is not a huge deficit, and honestly I've yet to work on a project where I said "gee, I wish CSB did X"
Then there is the sound - they sound different, neither one is better or worse, sometimes I want the Cinesamples Sony Soundstage sound, sometimes I don't.
And not to further complicate things, but I also use Chris Hein Orchestral Brass, not as often as the other two, probably because it is a little more difficult - for me - to get around. I fell in love with his Horns, and the Orchestral Brass does not disappoint. The sound is once again different, that's all.
When it comes to pop/rock/big band stuff I still use CHH, but I am also using Glory Days. And again it is two different approaches to articulations, and two different sounds.
I suspect one day there will be a one-size-fits-all brass library that sounds perfect for every application, and is simple to use, and includes every possible articulation... well, maybe not???
All this because I was working with the three orchestral libraries this weekend - trying to record brass choir arrangements of Christmas Carols, and it was fascinating the different directions I traveled depending on the library I was using.