First things first: bahn.guru helps me a lot finding routes and prices, I love it!
Recently I was looking up connections from Hannover to Domodossla. bahn.guru relies on the "old" booking platform where prices are considerably higher compared to Next DB.
Next DB

Old "Reiseauskunft"

bahn.guru actually doesn't even provide prices for the date above

It would be great if this could get fixed!