Is BioNTech Contradicting Pfizer About the Need for Booster Doses?

Pfizer CEO Albert Bourla has maintained for a while now that third booster doses of the Pfizer-BioNTech COVID-19 vaccine will likely be needed.
BioNTech CEO Ugur Sahin, however, recently stated that he's not calling for a third booster shot yet.
The two executives really aren't on completely different pages, though.