Just remember that as of now, the companies have not released any study data for third party revue.
The temperature restrictions for transport and storage make it nearly impossible for most of the world to use these vaccines. Only rich countries can afford the infrastructure necessary. PLUS they require two doses. A logistical nightmare.
Also what remains unknown is how long any immunity lasts. Important information considering the logistical issues with transport and storage.
-94F = -70C