Prepare the Corn. In a large skillet over medium-high heat, cook the corn kernels until they are slightly charred, stirring occasionally, about 5-7 minutes. Remove from heat and let cool.
Make the Dressing. In a small bowl, whisk together the mayonnaise, sour cream, chopped cilantro, crumbled cotija cheese, chili powder, smoked paprika, lime juice, salt, and pepper.
Combine. In a large mixing bowl, combine the cooled corn kernels with the dressing, stirring until well coated.
Chill and Serve. Cover the bowl and refrigerate the salad for at least 1 hour to allow the flavors to meld together. Before serving, garnish with additional crumbled cotija cheese, chopped cilantro, and lime wedges.