To my Irish ear, these are two completely different names, not even slightly similar. (They're also etymologically unrelated.) It blew my mind when discussions on r/namenerds revealed that many Americans consider these names similar or even identical.

For most of my (male) life, people misspelled my name Aaron as Erin fairly regularly. I think that has contributed to the confusion. I also used to get Arron, Airon, and other variants. The "A-A-Ron" skit has made a noticeable difference in recent years.