And for all those going on about how the next level up bracing isn't necessarily better... How many people here have built BTOs with Standard II bracing instead of CV bracing?
One bracing pattern isn't better or worse than another as long as they both allow the top to vibrate and produce sound.
All the bracing does is effect the stiffness of the top in various locations, which in turn effects how the top is able to vibrate, which in turn effects the tone of the guitar. And since tone is very subjective (what one person likes will not necessarily be what the next person likes), which bracing pattern one will prefer on a given guitar is extremely subjective, too.
As for the CV vs. Standard II bracing, I've never ordered a BTO guitar so the question as asked doesn't really apply to me. However, to answer the question more generally, the CV bracing causes the top to produce a bit more midrange. With rosewood, which has a well defined low end and high end, but a scooped out midrange, adding some midrange is a good thing in my opinion. But for a wood like mahogany that already has plenty of midrange, the CV bracing may or may not work (depending on how you want the specific guitar to sound) as it may end up too midrangey for the player. Hopefully that helps illustrate the difference.
For what it's worth, I have a 2010 814ce with CV bracing. When I string it up with phospher bronze strings (which I've been doing since the first string change), it sounds almost the same as the new, redesigned 2014 and newer 814ce with the AP bracing. They're not identical, but they're pretty darn close - think of it as a subtle refinement rather than an improvement. So the marketing hype about new improved bracing patterns is just that - marketing hype.
It's still best to actually play a guitar you are interested in before buying so you'll know what you're actually buying (and if you like it or not) rather than just assuming that newer is better.