Looking at HD's ratings on Torque between a Dyna Street Bob and a Softtail Deluxe.: The Dyna is 92.00 ft lbs @ 3000 rpm The Softail is 89.70 ft lbs @ 2750 rpm Why do they rate at different rpm's? Does it work out the same thing as if they were quoted at identical rpm's? Does Harley-Davidson use different engine series with different bikes, even though they are 96 cu. in.?