>>7532107now the onslaught comparison (left legit, right KO). If you don't know what to look for (mainly the screw colour) these look almost identical. The transparent pink and the silver on the KO are slightly lighter which actually looks better imo, as it makes for nicer contrasts.
The two antennas on the head of the KO are a bit bent because they are made out of rubbery plastic. The ones on the real one aren't and I've heard many reports of them breaking, so it seems the KO company wanted to avoid that.
The middle antenna on the Ko can be positioned more vertical as on the legit one, because the pin is situated slightly farther back. That's pretty much negligible though.
Also if you look at the folded up feet of Onslaught you can see the soles are molded slightly differently. No idea why