Not sure how you came up with the "highly derivative" claim. Could you name a single thing other than the color that is the same on both mods?
Not a clone, sure, I agree, but if you can't see the similarities, no amount of internet arguing on my part is going to change that. The Stratum was the first thing I thought of when I saw the D2 and judging by the comments I saw on Facebook, I'm not the only one.