I Have a gt that im very happy with, and would love to give the riot series a go, however cant seem to find info in comparison or talk to someone about the difference between the riot/riot xr? Any help or comments would be great. cheers

Maybe you should change the title of the thread so it reads correctly?
It should be "Core Combat GT Vs Core Riot XR"

I've flown both quite a bit, and I sell them.
Main things I could say is that the Combat has more bottom end, a more solid feeling bar, and in the bigger sizes noticeably more bar pressure than the same size Riot XR.
The Riot XR has a better top end in the bigger sizes, tighter turn, less power in the turn than the same size Combat GT.
They are actually quite similar, especially when you consider everything except the kites is the same.
And think the yellow in the Riot is slightly lighter than the yellow in the Combat too.

If you are happy with your Combat maybe stick with them? What size do you have? What size are you thinking of buying next?