The terms cover corner and stronger corner are not even terms used regularly by coaches in this context. Instead, everyone who is in the game, played before, or is educated in the craft uses: Field Corner vs. Boundary Corner.
-Generally, field corners align to the wide side of the field; need more speed and space coverage ability. Boundary corners align to the short side; often more physical, support the run, handle quick throws.
Additionally, Force Corners - Some defensive systems designate a corner as the force player in run support.
Lastly, Nickel, Star, or Spur - Slot defenders who sometimes take on hybrid run-support roles, but they’re not called “strong corners.”
You're welcome - take notes and give your Daddy "Hike" a call to let him know you learned something. Then share it with him as he is more.clueless than you are.