@deathpoolthet1000: Wolverines original mask had much smaller "horns" and whisker patterns that were actually somewhat reminiscent of A wolverine's face. Dave Cockrum drew Wolverine's iconic costume with the larger protrusions by mistake and they decided to stick with it because it looked cooler.
@laserlambert: he wasn't "created to be one". When he was first created, he lacked the "superman" like powers and his people were all alive. He was altered to be more like Kal when the JL was formed as you previously stated.