Can't say I've driven a Gt350, but I do have an R and if it doesn't exceed the 350 in all parameters, I'd be shocked. But since your opinion obviously has been formed by seat time in both, you are more informed than I.
I've yet to see anyone argue the R is slower, has less grip, etc. Please point it out if you have. You're referring to that factual information I discussed on page 3.If you think the R is better than the 350 in all ways (speed, grip, handling, feedback, comfort, sound, ride, value, etc.), that's great and you're welcome to your opinion - some of those terms could even be proven in certain situations (speed, as an example).