Dr. Blair Bittner compares porcelain veneers and cosmetic bonding for cosmetic dentistry, highlighting that both can address issues like discoloration and chipping. Bonding is quicker and less expensive but less natural-looking and more prone to damage, while veneers are costlier and more invasive but offer durability and a more natural appearance. Ultimately, the choice between the two depends on the patient's needs and preferences.