I am redeeming award tickets from SJC/SFO to Germany.
I could take a local train from FRA to CGN.
But am I correct AA will redemption from SFO to FRA will cost the same amount if I try to redeem for SFO to CGN?

Any other tips?

Incidentally, planning to stay there for 4 weeks. Are there some local train tickets I should buy so that I can se Europe?