I'd say the later SK is probably more correct and the PBR configs should match. I don't think ClusterXL will be able to actually tell if the PBR configuration is different between the cluster members (same way it can't tell if regular IP routing is different between them), but it may cause issues with how connections are represented between the members via state sync. Trying a different PBR config between different cluster members will probably work but will most certainly not be supported.
Gaia 4.18 (R82) Immersion Tips, Tricks, & Best Practices
Self-Guided Video Series Coming Soon