Has anyone taken a look at ION or Corda Settler?

With more and more networks going live, interoperability has become a hot
topic.  Just curious if anyone in the ILP community has taken a look at Ion
or Corda Settler.

Both claim their primary focus is interop for permissioned networks, but
that distinction seems a bit superfluous since the underlying concepts and
implementations are all pretty similar.

Ion:
https://www.ledgerinsights.com/students-barclays-clearmatics-blockchain-hackathon/
https://medium.com/clearmatics/ion-stage-2-toward-a-general-interoperability-protocol-part-1-d12b9d7316d3

Corda Settler:
https://www.r3.com/news/r3-launches-universal-corda-settler-application/