Originally Posted by
the810
If the new train has the same number, OP has to take what they originally booked. The train shown on their ticket is running exactly as booked. If the new train has a different number, then they can take whatever train they want.
The OP can take any train they want. Per the DB rules: The train binding is lifted "If it can reasonable be expected that the passenger will arrive with a delay of 20 minutes or more". And that is the case here. So you can for example decide to take an earlier train to arrive at your final destination at your originally intended time.