However thanks to Alex Petrov and Bitfury we have some more detailed data about the providers of the IP addresses of the nodes, and divided amongst Classic and Core we see that there is a significant difference. Let's look first at the Core distribution:
And for comparison, here's the Classic distribution by provider:
This is likely a result of various campaigns by wealthy bitcoin holders who support Classic, who have pushed for artificially inflating the Classic-supporting node count by spinning up instances at VPS providers/datacenters.
Interestingly, some Classic supporters, such as Brian Armstrong, still are touting the growing nodecount as a victory, despite this data showing that it is artificially inflated: