Yes, there is a big difference with NVidia being the winner!
Nvidia cards perform about 2x as well as the AMD cards right now since Open CL in Adobe still significantly lags behind Cuda. Don't get an AMD card at this point. BTW the Ray tracer in AE is Nvidia only if you even use that. That is the only GPU acceleration in AE but its rarely used. C4D doesn't use GPU acceleration unless you get a 3rd party renderer like Octane. That is Nvidia based though so you need an Nvidia card if you get Octane.
I agree with Eric. The only way that you can directly compare an AMD GPU with an Nvidia GPU would have been if both cards were using the exact same API (in this case, OpenCL). Unfortunately, in Windows versions of Premiere Pro CC, OpenCL GPU acceleration is permanently disabled with an Nvidia GPU installed, making CUDA GPU acceleration the only one available for Nvidia GPUs. (By contrast, AMD GPUs do not support CUDA at all.) And the CUDA GPU acceleration in MPE is still by far more mature than the OpenCL GPU acceleration in MPE.