A. It does vary from case to case. As a general rule crooked teeth are best aligned with tooth reduction. This helps to minimize thick & thin edges. If you are reducing tooth and using porcelain in thicker sections then feldspathic porcelain ( conventional ) will be more aesthetic in my opinion. ( with the money saved you can buy the talents of a really top ceramist ) Alternatively combine some adult orthodontics (braces/ clearstep/ invisalign) with veneers to reduce the amount of correction needed.