according to Mankau/Petrick it is highly doubtfull that any 410B got the stronger DB603G. The most ones had the same engine as the 410A.
and a lot of As were armed and used as daylight Destroyers (heavy interceports) actually.
there were even oneseater versions with GM1 engines
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the 410B was one of the "Dreams" of the Luftwaffe brass that came never true as planned - as so many LW porjects...............