What I found is please Notice here .... I have made a single image for comparison of what specs are found for CG and GD ...
If you take a Close Look You will Notice that :
1 - GD is more heavy in wirght then PowerPlus CG
2 - GD has Less Torque then CG (hence CG is going to smoke in acceleration and initial Pick up)
3 - GD has over all less Horse Power and More weight the CG hence There is going to be a massive lead by CG if put head to head.
4 - Regardless of what we see on You tube most of the websites which are marketing GD show its top-speed some where near to 85KMH only where as Honda explicitly explains there CG marks 105 in healthy state with 11 Horses.
Its just what I found on Google you guys can Google through official websites of the rides as well ... I am not publishing an Official verdict so dont start shooting bombs on me.