RS 660 2022 vs RS 660 Extrema 2022

In terms of raw performance, these two are evenly matched. The RS 660 and RS 660 Extrema produce nearly identical power figures, meaning the real-world difference will come down to gearing and torque delivery rather than peak horsepower. Both bikes share a similar footprint on the scale, with only a negligible 3kg difference between them, so handling characteristics will depend more on center-of-gravity than raw weight. Bottom Line: It's a close call. Choose the rs660 if you prefer its specific styling and ergonomics, or the rs660 if you want the alternative brand character.