Conventional loan APR: Credit union vs traditional bank

[Ethan McRae]

I'm a first-time home buyer interested in house hacking. I'm interested in getting a conventional loan and considering using a credit union. 

With rates as they currently are, I'm looking for every angle to get the lowest rate possible, and from what I understand, credit unions can offer rates slightly lower than traditional banks. 

Curious to hear about investors' experience with credit unions. Have you secured considerably lower mortgage rates with credit unions compared to traditional bank rates? How would you go about looking into credit unions? Is there an efficient way to compare APRs between credit unions?

Many thanks