1) Wikpedia says 410B had THE SAME engines as 410A. (not very reliable source) 2) Soviet VVS test pilots said "tested Me410B-2 had DB603A engines. So perhaps DB603G were only in plans?
sry, I'm a little biased c'ause of the euro 2012 in poland which I want to see uberfail j/k, we'll make it on time ROTFL we're sooooooo NOT Roland?