Did you not get a damn word of what I just posted? If you do inclines you hit your chest from a different angle than other chest exercises. This in turn may spur more growth, so the mucle may grow larger, yes. It is NOT necessarily about what exercise you do, rather what exericise provides hypertrophy which, with a proper diet, will cause that muscle to grow. I'm trying to get you to understand the concept here, not just "what exercise should I do"?
Apparently your routine and/or diet needs tweaking to get where you want to be. There are so many variables it's not as easy as just "yeah dude do more inclines and you'll get a bigger chest". This may prove to be true because of increased volume and hypertrophy, which coupled with a decent diet could yield results, but you need to understand wtf is going on behind-the-scenes with the interplay between your diet and training (not to mention any supplements/anabolics) to be able to fully alter and manipulate each to get the results you want.