Havoline or Valvoline?

I'm in Georgia.

I have full service wash with Havoline. I thought about changing to Castrol, but I didn't like the price. If the Valvoline cost me same as Havoline, would you recommend me to change the brand? In other words, is Valvoline a better brand for the customers?

-tom

The one big advantage to Havoline is that you can also take Shell/Texaco cards.