Naughty skeletons have 3,000hp. The Mu-Miyah have 10,000. Both types of skeletons vuln for bludgeon, frost and acid (at least) and cast wars against their vulns. The Mu-Miyah do not seem to vuln but hit hard and fast UA bludgeon.
Here's some trophy info for the Sanamar Collector:
Skeletal Jawbone - Green (Naughty) = 1,400,000 Skeletal Jawbone - Red (Wicked) = 1,700,000