Cap Unscrambling Machines specification should start with the real closure.
A cap unscrambling machine should not be specified only by the size of the hopper. The critical points are how the closure separates, how it is orientated, how it enters the chute and how the capping machine asks for caps. A correctly chosen feeder keeps the capper supplied without excessive pressure or bridging.
For a better buying decision, the useful comparison is not only hopper size or headline speed. It is how the feeder behaves with your closure, how the capper receives the cap and how easy the line is to run after changeover.
The safest specification route is to start with real closures, target output, line photos and the exact point where the cap must be presented. That avoids choosing a feeder on a generic speed figure that does not match the cap or capper.