Porcelain veneers have a beautiful shine to them and should match the texture of your natural teeth. Some natural teeth are not shiney and you can make the porcelain match that finish as well.
Composite veneers can look great-they usually match your tooth so well that you really should not see a transition. They are usually less shiney.
You can go for a second opinion to check but try wiping them off with a tissue and look at how they appear. Both have advantages and disadvantages.