Bonding adds material to a tooth. Veneers replace its front surface. The first is more conservative and repairable; the second is generally more stain-resistant and longer-lasting. Neither is simply better.
Bonding often needs little or none. Veneers usually need some reduction, though how much varies by case.
Reversibility
Bonding is the more reversible of the two.
Staining
Composite can pick up stain over years; porcelain resists it better.
Repair
Bonding can often be patched. A fractured veneer usually needs replacing.
Visits
Bonding is often one visit. Veneers involve a laboratory stage.
Cost
Bonding is usually the lower initial cost; veneers usually last longer.
How the choice is usually made
For one small chip or a modest shape change, bonding is often the proportionate answer. For several teeth where colour, shape, and surface all need changing together, veneers may achieve a more stable result.
Whitening is usually considered before either, because neither bonding nor porcelain changes shade afterwards.
What we can explain here — and what needs an exam
A page can inform you. It cannot examine you.
We can explain online
How each option works
Why whitening comes first
Repairability and staining differences
Determined after an exam
How much reduction your teeth would need
Whether your enamel and bite suit each option
How many teeth are actually involved
What each would cost for you
What to do next
A smile consultation with photographs is the point at which this becomes a specific answer rather than a general comparison.