Flip Top Cap Orientation specification should start with the real closure.
Flip-top caps introduce directional features that matter for presentation, decoration and closure handling. The feeder needs to control the hinge, open side and cap orientation so the capping head receives each cap consistently.
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.