Cap Orientation Bowl Feeders specification should start with the real closure.
A bowl feeder is often the best method where the cap profile allows mechanical orientation inside the bowl. The tooling must be developed around cap depth, skirt shape, ribs, tamper band and any decorated or open-side requirement.
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.