IMO
I do not know of any rating system for the lock holes of cases.
IMO, the steel reinforcement is merely to prevent wear on the plastic holes. It does not provide any structural support to the holes as they are basically thin sheets of sheet metal folded over the holes and held in place by a indentations that protrude into the plastic.
The plastic portions of the holes in the Pelican, however, do seem to be a little thicker than the Storm's (both are tapered) and there is more plastic around the outsides of the hole at the outer edges of the case. That is, not considering the metal, the pelican lock holes do seem a little more thicker and plastic reinforced. The holes in the Storm, IMO, still should be able to hold up under constant use.
IMO, it would be easy to defeat both with a good set of chain cutters.