case nvcc uses the specified 'real' architecture and its closest 'virtual' architecture as effective architecture values. For example, 'nvcc --gpu-architecture=sm_50' is equivalent to 'nvcc --gpu-architecture=compute_50 --gpu-code=sm_50,compute_50'. -arch=all build for all supported ...
I can tell that the ES68s are just a tad sharper. Nothing radical, but the difference is there to be seen. But when I'm using an Expanse (or sib) I don't ever think badly of them (except looking at Jupiter or the moon with the 6mm Expanse, which throws up a noticeable...