Ribs is the only KCBS category where the comp version can even remotely compare to backyard in my case...and maybe even most cases. Very few are injecting ribs, or doing other things that seem crazy to the average person like happens with chicken, pork and brisket at comps.
The main differences are personal preference, really, as in tenderness (some like fall off the bone which is a no-no in comp) or sauce (some like them dry but comp ribs do better with a sweet sauce on them).
I cook ribs the same at home as I would at a comp. I'm not a fall-off-the-bone guy, and I like a sweet glaze on my ribs.
What I don't do at home is box them.