There is little to no difference between most string brands. Daddario, Ernie Ball, GHS are all going to sound and feel the same. I've been using coated strings for about two years now. I've tried elixirs, daddario, EB, and GHS and they all sound and play similar if not the same. They're all made the same, steel wrapped in nickel. There are some that are all nickel and they have their own sound too, less bright.
There are some makers who do things a little different. DR's are supposed to wound a little differently, but I would guess that they don't feel our sound entirely different. Dunlop strings are cool, they're wound to tension so they take practically no time to stretch which ultimately makes them last longer.
I work at GC and for a long time I worked behind the Accessories counter selling LOTS of guitar strings. What it comes down to is blind brand loyalty. Or something like that...