One consideration is whether you will be working on your kit yourself, or paying a bikeshop to do it. SRAM kit is certainly a little fiddlier to work on, especially when it comes to replacing cables. I have been running a Dura-ace groupo for 5-6 years now and I seriously can't fault it. It's never let me down and is showing no signs of doing so any time soon. It is a personal thing though, and you really need to have a go on both before deciding.
Or just accept that they're both excellent and that you'll get used to whatever you buy.
One consideration is whether you will be working on your kit yourself, or paying a bikeshop to do it. SRAM kit is certainly a little fiddlier to work on, especially when it comes to replacing cables. I have been running a Dura-ace groupo for 5-6 years now and I seriously can't fault it. It's never let me down and is showing no signs of doing so any time soon. It is a personal thing though, and you really need to have a go on both before deciding.
Or just accept that they're both excellent and that you'll get used to whatever you buy.