I'm looking at a couple of Canyon Aeroads, the DA is £3799 and the Ultegra is £2649. Is there much difference in day to day performance between these 2 groupos? The weight difference is neglible. I currently ride the older 7900 DA and it is faultless, I also have Ultegra 6700 on my Winter bike and the shifting is truely abysmal!! TIA