For symmetrical wings, like those, the difference is negligible; especially when the plane is flying fast and at low AOA's.

For high AOA's, like during landing, severe banks or loops, the ailerons that are down may induce some yaw towards the side on which they are (adverse yaw for turns).

Remember that whatever differential you introduce, will increase adverse yaw when flying inverted, as stated above by cfircav8r, especially at high AOA's.

Rudder is your friend, always, and to coordinate turns is not a sin.