@millihertz The only other paper I know of for energy efficiency comparisons is this one:
https://greenlab.di.uminho.pt/wp-content/uploads/2017/10/sleFinal.pdf
Too coarse for the sorts of things you're interested in. For the paper you're talking about, was it this one?
http://www.ittc.ku.edu/~kulkarni/teaching/archieve/EECS800-Spring-2008/VM_impact.pdf
@cstanhope yes it was... and if that's the only paper on the subject that anyone can find, we direly need more research!