Only thing I care will be if the DW matchs other kitchen appliance. I perosnally prefer Jenn-air, only because I like their fridge and hood fan, then so go the rest of kitchen apllicances. There is nothing can shows that BOSCH is better brand in anyway. I do not even like their looks, too much...
About function or feature, one is how the dishes get dried -- heat options, another is how many "cycles" -- Pan, China .. rinse only... To get things simple, forget it, none of them really matters.
Overall, if you just want to buy ONE DW to use -- my suggestion is no more than 400$, and go with the looks -- they all works the same.