I am repowering a 2002 Ranger 520DVX with a Suzuki 200. Dealer has both motors in stock. From what I see the df200 has a 2.08:1 gear ratio and the SS has a 2.5:1 ratio. According to a prop slip calculator I tried, it appears that with a 28 pitch prop engine rpm 6000 with 10% slip the df200 would run 71.59 mph while the SS would run 57.27. Is there some other advantage to the SS model?