Maybe he was describing variations of the same zone. You can play them plenty of ways just by adjusting the cover. We can see the same 1-3-1 or 2-1-2 adjusted for match up, trapping, interior heavy, perimeter heavy, and realistically, most of the gimmick sets come from the basics with one or two floaters on specific shooters.
I frickin hated zone. I only think it makes sense as a change of pace, for tempo and trapping, or if a team has absolutely horrible outside shooting game and either a great penetration game, or a monster inside.