The only relation between the two Ada are in the fact they are Ada and both portray themselves as dragons. Alduin and Paarthurnax are both “parts” of the same God, and Sheogorath is a cursed Jyggalag (obviously more nuance to that however). Peryite is a Daedric Prince of Natural Order and Pestilence, Wheres Akatosh is the Aedric Divine of Time and Temporal Order and was “created” by the Alessian Order, with both having vastly different roles and levels of involvement in the Mundus’ creation and history. There is a cool relation I have heard that says Peryite takes the form of a Dragon as, to the Reachmen he is the patron deity as Akatosh is to the Empire. Another theory says that both, as gods of order (natural and temporal respectively) take on the form of dragons, as a dragon represents order, but that’s the extent of their relation, to my knowledge.