Were it me, I would probably do white as I think the clear would look "off" and actually stick out more. There are companies that make an off-white caulk if you feel like going down that rabbit hole.

Unless there’s a better match of caulk I would use clear at counter and at top of backsplash along the wall use white since it goes with the trim work.

I would go caulk shopping and find one that is the color of the white in your countertop and use it for both places.

You want Translucent White from Axiom, I promise. Nothing will look better.

I have never used that but sounds like a great idea thanks Joseph