First of all, everyone should ride the particular models that they interested in buying, before purchase. That is just good sense. Now, as far as the advantages of riding a Road Glide over others, there are a few. First of all, the frame mounted fairing is what sets a Road Glide apart from all the other bikers. You can always tell a Road Glide when you meet it on the highway because it will have twin headlights staring at you from within the fairing. The other touring bikes all have their windshields and fairings attached to the front forks. That is fine as it allows a different look. Remember that last sentence because we will get to that a bit later.
By having the Batwing fairing attached to the front forks there is a tendency for any side winds (at high speed) to affect your steering. I have ridden side by side with other touring bikes and at interstate speeds of 60+ where you are enduring a 30-40 mph side wind, the Road Glide will be more stable in that the wind pushes on the frame instead of the steering forks. That in not to say that the other bikes (Batwings) become unstable, but the gust of wind tends to put pressure on the front forks of the Batwing bikes. When a Sharknose (Road Glide) fairing encounters wind gusts the pressure is applied to the frame, not the front forks, which steer you. Road Glides tend to go straighter in high winds and high speeds. High winds don't affect either the Batwings or the Sharknoses when your just cruising along at 30 mph, but get up to 70+ and you will feel the difference when the wind gusts are 30-40 mph.
At the end of the day selecting either a Batwing or a Sharknose is a lot like picking your wife or husband. The first thing you noticed about them was how appealing they looked to you. Beauty is in the eye of the beholder. M'Cs are a lot like that, if you know what I mean.