Originally Posted by
jimc101
You say double tap vs STI isn't important; would try some bikes out with the different systems, as they will give a very different feel to how the bike shifts.
I have two fairly similar bikes, one with Tiagra 9-speed shifters and one with SRAM Apex. They do work a little differently, but both work well and I don't have trouble mis-shifting when I switch back and forth between bikes. One very noticeable difference is that the Apex shifters make a much louder click than the Tiagra, which makes it sound a little clunky even though it isn't. I really don't care about that, but some might.