It is recommended to do the following:
1. Install a new SpectroSERVER system in the "other" DSS environment that is compatible with the current SpectroSERVER installations.
2. Sync the catalog on the new SS system with the catalog of the "other" DSS environment. Use the "Master Catalog" solution discussed in knowledge article 121348 "How to propagate catalog changes in a Distributed SpectroSERVER environment
3. Use the Modeling Gateway to export the models from the one SpectroSERVER and import it into the new SpectroSERVER in the "other" DSS.