It just seems like they are pretty much the same thing with a small diference. Wolverine got better claws and is more skilled.Sabretooth got the size and strength. And Wildchild got the Speed and agililty. Other than that they are pretty much the same and the only reason they realy don't get along should be there feral instinct to prove they are the alpha male.
Protecting and Serving to make sure Meta-humans follow the laws of man.The work with the police forces in every major city in the US called in when there is a metahuman crimewave or need metahumans arrested or for investigations.
Part Of the Metahuman CSI team perfect in this area because of his tracking skills.Sabretooth has had all memories of his child abuse and wolverine wiped.He is now seeing a shrink to help with his rage issues.