I looked up the geometry and that does look similar between the Ruby and the FX7.6 (some difference, but that not far off). The biggest difference is really how you are sitting on the bike since the Ruby has drop bars and the FX has straight bars. With straight bars you are sitting much more up right than with the drop bars. Believe me I know as I have a Trek mountain bike, which I'm not nearly as comfortable on as I am my Felt F-5 (road bike) and the biggest difference is the bars, the mountain bike has straight bars and the F-5 has drop bars. I'm just personally more comfortable with the drop bars.