1, yeast type difference: dry yeast refers to active dry yeast, which can be activated in warm water to start fermentation. Angel yeast is a kind of dry yeast, which can be directly added to dough without activation after freeze-drying at low temperature.

2. Difference in usage: Dry yeast needs to be soaked in warm water to activate it, and then the activated yeast is added to the dough for fermentation. Angel yeast can be directly added to dough without activation.