Can anyone tell me if there is any noticeable difference in the Pebble Sheen finishes that incorporate Shimmering Sea, and those without? I am going between Pebble Sheen Prism Blue and Blue Surf. I am drawn to Prism Blue, but is it worth the extra cost for the additive? I have never been pleased with our original finish and want to make a choice I will be happy with for many years. Thanks.