Glad I bought a 2014 FX 7.5. I feel that the ride on my 7.5 is much better then my old Giant FCR3 but I don't know if that's because of the Isozone or some other design factor. Interesting that the 2015 comes with a 48/34 crank since the first thing I did was swap out my stock 50/34 ring for a 48/34 ring although the 2014 has 9 gears instead of 10 like the 2015. Since I have arthritis in my left thumb switching to the 48/34 allows me here in Texas to ride using the big ring only. I also love the metallic black color of the 2014.