Well, it looks like in the photo she is in a snaffle and ridden with two hands, so can't be that different from what you are used to. It's not a whole different language. Horse still goes off of rider's energy and still works from leg into hand, just maybe not so much leg and not so much hand. Hard to say, some western ridden horses aren't so light, and arent neck reining.
One thing I have noticed about many western trained hroses is that they are trained to canter from a "kiss" sound and trot from a "cluck" sound.