A cloud provider that specializes in compute will have vastly higher energy costs than a cloud provider that specializes in storage. Even without explicit specialization, it's not unreasonable to assume that the distribution of compute-heavy and storage-heavy customers is quite different between providers. So you'd have to sort of calculate that out.

But if you do that, I'm not sure what would even differentiate them. They're all using essentially the same hardware. They all have the same cooling requirements. I wouldn't expect an average to be very interesting.