Should be the same, the fact remains that Nvidia's implementation using the hardware on-board of the GPU is having an advantage. To what degree, I wouldn't know specifically, but doubt quality changes because of that.
I find it odd that people say "No, Nvidia is better" because clearly it's the same technique, only the hardware said on-board of each vendor GPUs might differ in how they handle that workload.
Personally, I think Raytracing is cool, but it's still too early for GPUs to handle efficiently + costly and isn't any factor for me buying any vendor/game. Nor do I care much about it.