I find rsx STIs to be of better quality and function than soras. Not to mention they look a lot better. The downshift lever behind the brake lever is a lot better than sora's thumb button. I have a set on my trek 1100 and they shift beautifully. Every shift is solid and crisp. 7 speed RSX levers also bring a higher premium over 7 sp Sora level shifters so others out there must agree.