One Click Upsells vs. Thank You Page — what's the difference?

One Click Upsells occur right after the payment step of checkout but before the thank you page. The main benefit of One Click Upsells is that they do not require re-entering payment information, whereas Thank You page upsells do require re-entering payment information for paid items.

Comparison

One Click UpsellThank you page
Adds to original order
Doesn't require re-entering payment
Multi-currency
Cash on delivery
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