school me on the different kinds of pistons

newbie question, but id like u guys to explain to me the differences between dished, flat top, and domed pistons. also i posted an earlier post trying to learn about quench. am i right in saying that u need dished pistons to obtain quench?

this is a pic of the pistons that came with my stroker kit.

Simple dish less compression Domes more.I have 12.5 Roxx domes in my 440.There are flat tops also.Rocky