There's not german team that approaches Red Bull.
For starters, Red Bull has quite a handful of German U20 athletes, Sander, Wirt, Schutz, Eckl...
Then they have imports like Nordberg, Evertsson, Meisaari, and Laakso.
Then they have Austrian U20 nationals like Schreier, Zitz, Huber, etc. That may not sound significant, but Austria's U20 team has beaten Germany the last 2 times they've faced off.
Insofar as many of the best german talents (Gawanke, Bokk) don't even play in Germany, and wouldn't qualify for any german squad, Red Bull is probably the best way to go.