Essentially yes. The difference would be that we measure "what you use" more granularly since you'll only be charged while something is being run on the GPU, no

Essentially yes. The difference would be that we measure "what you use" more granularly since you'll only be charged while something is being run on the GPU, not the entire time the instance is running. This is where the "shared" aspect would come in, since during unused GPU cycles someone else could use the GPU.