What does a better circuit board do on a paintball gun?

Answer 1

"better" is a matter of opinion but largely aftermarket boards will offer more firing modes and more in depth programing over stock boards. That aside, the vast majority of stock boards today have everything you will ever use on them, all major tournament modes and many have a user defined mode already. in the last handful of years we have seen a decrease in the number of aftermarket boards largely because stock boards are getting so good.