Dutch,
The Swipe & Save which I have is 3 cents/gal gas or diesel.
The link you provided is to the GS charge card.
The only advantage for the charge card AFAIC is that at the truck pumps you swipe, fuel, go and the charge will be deducted from your account.
The Swipe & Save will start the truck pump but you pay inside. At the car/RV pumps you can pay at the pumps with another card.
The net is that with Swipe & Save you have a 3 cents/gal discount plus in my case 5% CC cash back or 13 cents for fuel at $2.03/gal vs 8 cents for the charge card.