If that's true, then the Moderna vaccine should be more effective. If I recall, Moderna has 19% of the virus, where as Pfizer only has 4%. Could be off on my percentages.
Moderna does have more side effects from what I understand.
Israel is dropping the Pfizer vaccine for purely Moderna starting in August except for those under 18 (because Pfizer has been approved for under 18 and Moderna has not). I’d say their studies are showing the same thing with the Delta variant.