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The Luker's claws/legs are choppy, you removed some of the black on it that was supposed to be there... Missed two spots between the legs on the left btw.
you shoulda removed the shadow from the first one, it pretty much destroyed it, 2nd one is great though, no problems there
1st one looks quite bad imo. 2nd one is fine (even though you can just google it already rendered, which this one is)
I was just about to say that you left the shadow on the dragoon "render"... take it off next time, there is no need to have it. There is also a ton of white around the dragoon and it's shadow. Try to minimize that. The second one is ok, the picture is good, the render is choppy.