I've recently bought a ybr-g and had quite a few rides on both the ybr z and gd110s, in terms of over all smoothness and ride quality, the gd110s is superior, ybrz has a better pick and good low range torque, plus handles pillion better than 110s,
fuel economy is comparable and so are resale values,
the 110s is expensive to buy and maintain but it is better built than ybrz and offers more kit, so if you're a lone wolf, I'd get the 110s,