They both are unique, but in the end, Cortez has the best one. Why? Well,
Cortez has nice flow, and the colors match well with the sig. The popping out render really adds a nice tough to it. I have to say, Cortez has really improved since the last sig. 9.5/10.
And paint dot mike's sig is also nice. But, the render is pixelated and the tire gets cut off at the bottom. And there are really no effects going on.
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Therfore:
Cortez: 1
paint dot mike: 0