Yamaha is always been a favourite of all bike enthusiast and yamaha fz-s has also been and it is but according to my opnion the version 1 was better only in terms of power in ride quality, handling, fuel efficiency.
Etc all other are the best in version2.0 but the power is on the smaller side version 1.0 has got 14.8 bhp while the version 2.0 has got 1 bhp less ie: 13.6 bhp on throttle only the power of version 2.0 is satisfactory rest all is awesone.
