I dont think it is. Maybe vr6 can chime in but what I think vr6 was saying is the 09 Green zx10r looks better than the 08 Green ZX10R not because of any change in the Green color, but due to the other items like the partial white side pieces ect.
Kawasaki did change the color mid-gen back in 2005. 2004 and before was the older shade of lime green and I actually prefer it. Why Kawi did this I do not know. 9R to 10R was the first to point this out to me a couple of years ago.
I also checked Color Rites website and it doesnt show a change in the green shade from 08 to 09.
Im not surprised the HotBodies color doesnt match, thats par for the course for them and not unusual.