The issue with DDG was punching rather than open palm, which suggests he didn't back himself or has an injury. Because his technique and stance is identical to Henderson, and also Allison, Ter Stegen, Ederson and Lloris, 4 keepers known for making big reaction saves. The only area Henderson is objectively better is in the air, his reactions arent actually as good, and his abilty to cover space isn't currently as good. He gets a lot of leeway because he's one of ours (despite actually having a bit of a shocker in his last game)