Yamaha fzs looks are so attractive and milege is verry great and its 2.0 version is awasome I ahve this bike and I am very happy with it Both the bikes are good, the yamaha fz fi is more refined and lacks the grunt as that of yamaha fz. The fz fi has also gone through new styling language updates.Other than that both bikes perform almost the same and have almost same maintenance cost. I am satisfied with this bike