99.9% interchangable. A friend had an Asuna sunrunner and got tired of asking for Asuna parts and just called it a Tracker or Sidekick when she order parts to skip the step of explaining what else it was badged as to the parts guy. Well she eventually managed to find something different with it.
And I unfortunately can't remember what it was! Argh! At any rate there is at least one minor difference.