Personal preference.. like Oils Secret is to change often. In fact one should/could change their Filter between oil changes as current oils are longer lived and filters fill with crap long before the oil additives die off.
Bosch spark plugs are German too, and bosch made the ignition system. But NGK's work a lot better. Not everything German is top quality Not saying the bosch filters are bad - just OEM ones are the ones approved for the engines.