Quick answer: Whitening targets tooth color; veneers can address shape, spacing, and proportions (and color). The best option depends on enamel condition, goals, and bite factors—this guide is educational.
Educational content only. Results vary.
Comparison
High-level differences
Answers "which is better?" without blanket claims.
Whitening: focuses on shade improvement; outcome depends on stain type and enamel.
Veneers: can change shape/proportion/spacing + shade; requires planning and maintenance.