Originally Posted by
SK AAR
In reality the OP may succeed when there are two different airlines involved, but if the OP had been rebooked to a KLM flight the following day and this flight was delayed, there is zero chance that KLM accepts to pay comp., twice. The only reason the OP may pull this through is that DL would be unaware that the OP applied for comp. from KLM. Anyway, the OP will get no comp. for weather related cancellation so there is no issue.
In reality the OP will have a case...
That's the relevant judgement in German:
?Doppelte Ausgleichszahlung? bei Umbuchung und anschließender Verspätung des Ersatzfluges | Neubauer Wahnfried Rechtsanwälte
In summary:
There are 2 cases: 1. The compensation due for the delay in AMS.
2. The rebooking represents a new case.