I'll go with the ProDS for two reasons:
1. I prefer the value and convenience of the 6-quart smart change box and the recycling opportunities it provides.
2. I dislike the color green that Quakerstate uses on their bottles. I find it garish and unpleasant.
Otherwise they are both high quality synthetic motor oils from well known and established companies, and I believe the meet the same or similar enough specs. Your engine won't know the difference and that leaves completely trivial points like which brand/logo/color you prefer.
Cant go wrong with either.
Throw Supertech in the mix.
have you looket at Autozone. Rotells gas truck (works in cars too) for $2/qt on clearance. There is a rebate for $2/qt as well so the oil would be free after rebate.
The OP lives in Mississippi, that's hardly a factor in choosing one of these over the other ...„
I'd choose Havoline, never did me wrong when I used it years ago, in the frigid state of South Dakota during the winter or summer.