How long does it really take for trickle down technology to reach the lower echelons? Tech Editor Simon Smythe has put the current era Shimano Sora 3300 up against his faithful Dura-Ace 7700 to answer that very question. Both are 9 speed groupsets, both use rim brakes and both are mechanically operated. So the questions stands, how much difference really is there? Well it seems there's a quite a lot; Dura-Ace is lighter, shifts more smoothly and looks better but Sora does still have it's benefits like fully integrated routing and better ergonomics. Which one would you have?