How should I choose between the color-enhancing and natural appearance sealers?
This tends to be a personal preference.  Some customers love the look of their hardscape when wet, which is where the term “wet look” was formed.  “Wet look” may or may not mean a glossy finish, depending on the manufacturer.  Black Diamond Coatings offers different degrees of sheen – from semi-gloss to no gloss, depending on the customer’s preference.  Note that many of the lighter hardscapes (e.g., white, ivory, light gray) may not benefit from a color-enhancing sealer, when the owner may prefer the natural appearance.  In this case, consider the AQUA-X natural-appearance sealers.  As with all products, we recommend applying a test area prior to application to ensure the desired results will be achieved.   Always test the chosen sealer on a small, inconspicuous area (at least 4 square feet) prior to sealing the entire project to ensure your satisfaction with the results.