Moderna's vaccine is a great deal easier to store than the BioNTech/Pfizer vaccine (requires 'normal' freezers for storage, can be at refrigerator temperatures for a longer period).
BioNTech and Moderna both have links to Katalin Kariko so while they didn't explicitly work together on this the knowledge comes from similar research and sources.
Moderna's vaccine is a great deal easier to store than the BioNTech/Pfizer vaccine (requires 'normal' freezers for storage, can be at refrigerator temperatures for a longer period).