This is a difficult question and is a matter of personal preference and how your surface sets up.
Solvent based products produce a much deeper color change in the paver surface and tend to last longer.(Most of our customers choose this option.)
Water based products on the other hand are generally more forgiving in terms of moisture being present and while they produce a more subdued look, they are an environmentally friendly option.
We offer a full line of both product types and are happy to go over options and recommendations at your home.