It depends on who's viewing it.
Am I a Harmony Gold lawyer? Then they're exactly alike, down to the last detail, and a clear infringement of my copyright for the very
concept of a "giant, bipedal, mechanical war machine" that I've gained by outspending any other US company who thinks differently. As evidence of this, I feel that
this looks identical to
this, which is why I'm suing over it.
Am I a rational person? They have a vague similarity (bipedal, big guns on the arms, at least one offset missile launcher off the shoulder), but something easily explained by simple convergent evolution (there's only so many ways to depict a bipedal war machine with at least one shoulder missile launcher and big guns replacing the forearms) or even raw coincidence, and it's not something to be concerned about whatsoever.