Since nobody replied I will answer as best as I can.Gibt es hier Erfahrungen der Luftfusion im Vergleich zur Luftkappe?
The Luftkappe increases the negative chamber about +40-50%. Doing so it allows to increase air pressure about +10% for improved support without losing comfort. But it decreases the positive chamber volume.
The negative chamber of the Luft Fusion is at least 80% than stock, and up to +105%. The positive chamber is also bigger. So the pressure increases +25-30% without adding progression, and comfort is even greater.
The new Zeb Debonair+ air spring is a copy of the Luftkappe. This chart I posted earlied comparing the stock Zeb with the debonair+ and LF can be considered valid also for the Luftkappe.