Jim, quickly a few points. First is that dropbars for racer folks really depends on how a bike is setup frame wise, ie is the headtube area much lower than the seat, ie for racing, ie to get your head out of the wind in an aggressive position. Touring bikes tend to have higher up front ends, so its not the bar that is the diff, but the headtube, fork steerer length, stem used etc. If a given bar has a good shape, it doesnt matter wht bike its on, it can still work on diff bikes.

then about carbon bars, lowering weight is always nice, but dont forget, carbon handlebars cant be used with handlebar bags because of the mounts clamping on etc. so unfortunately are not suggested for touring bikes.