Sram, shimano, campag etc,  they all change gear, all work well, its just have minor differences in how a change is activated, brake lever, separate lever(s), double tap, electronic etc.  Its a bit of personal preference / what you are used to, but you soon get used to "the other one". 
I switch between bikes with Ultegra, downtube shifters, bar end shifters, mountain bike shifters, SA trigger shifter and you don't give it a second thought*.  It all works and above a quite basic level, it all works very well, and the extra cost is a bit of aesthetics/  a carbon lever here or there / bragging rights at the cafe. 
*I find the mountain bikes a bit weird as I rarely ride them, so when I do I feel like my arms are so far apart I'm hugging someone chubby.