"There's not a night-and-day performance difference between them, and the E requires the very best gas you can find while the F runs on regular. Be careful what you wish for..."

Very true. Biggest difference between the 2 would be fuel economy. High compression engines have better part throttle fuel economy which makes up a little of the difference in the price of the 2 fuels, however, I hate being forced to use good fuel. Life is so much easier with lower compression. :)