I think bad guy having the same skillset is really just a superhero trope.

• Flash vs Zoom
• Green vs Yellow Lantern
• Spidey vs Venom
• Aquaman vs Black Manta
• Wonder woman vs Ares
• Green Arrow vs Dark Archer

I listed DC heroes primarily to show it isn’t just a Marvel thing. But all of these arch enemies are basically evil duplicates of the hero.

I think the trope largely stems from a “How do you defeat someone who is as powerful/strong as you” kinda thing.