Trying to decide on a bike but have the option to get SRAM or Shimano. The frameset in both cases is the same with slightly different components but costs roughly the same: $1499 for the one equipped with SRAM and $1495 for the one with Shimano. The one with the Shimano set is sold out and there's a possibility it will be back in stock and the one with the SRAM set is available now.
My question is if there is a huge difference between the Rival and Ultegra sets? I've only ever had experience with Shimano and that was a 105 set. Any thoughts?