The R is better in every way, do it, you will not regret the decision. As for the fuel mileage, don't sweat it. I have a '19 R with a Stage 1 tune, spirited daily driving (60%hwy/40%city) yields about 23-25mpg. On the hwy (road trip) it's in the 28-32mpg range. I know it's a 4 cylinder, but it's...