Where I live, both are pronounced exactly the same. I do admit, though, when I sat here pronouncing both... I noticed the RON of Aaron and RIN of Erin were pronounced slightly different.
“When all Americans are treated as equal, no matter who they are or whom they love, we are all more free.” -Pres. Obama
"A great democracy does not make it harder to vote than to buy an assault weapon." -Pres. Clinton