Out of all the questions I get asked, I think the diffusion/filtration question is the one I get the most often. This is just my opinion, not VapeXhale's, just mine alone. Some people may disagree, but for the most part, I believe my findings/experiences to be accurate for the average vaporist.
If you are all about the flavor, smaller volume pieces preserve the flavor better than larger pieces. When it comes to which perc diffuses best or how many diffusers you should use, this is really all preference. There are times when my throat is really irritated and I'll bust out a triple chamber bong to really smooth out the vapor. Most of the time though, I opt for a double chamber piece. For me, I still get enough of the flavor and the vapor goes down real smooth.
When I use single chamber pieces, usually I can take a pretty big hit, probably 70-80% my full lung capacity, when I go to dual chamber, I'm closer to 90-95%. With a triple chamber, it feels like I can inhale all day long. Hope this helps