This was all discussed to death be hahnmeister (now banned) over on RC a few years back. There is more to it than that apparently the windings...some of the guts inside the block are different as well.
Either way I never hear about these being used as returns. Wonder how they are stock compared to a red dragon. Noise etc? I still would prefer to always use a submersible over an external any day. I hate the thought/worry about seals going etc.
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