Heads/Tails setup indexing vs Windows search question.

I have an environment where an additional Indexing Server has been stood up to help relieve processing resource and catalog corruption issues.

 

This new server is part of a Heads/Tails setup where the head is a pair of load balanced Integration Servers, and the Tail is two servers, one using Windows Server R2008 & Indexing Service and this new one is running Windows Server R2012 & Windows Search.

 

The administrator is in the process of replicating the DMSINDEX content from the existing server to the new server, to test the setup.

 

Are there any issues in the tails servers using different processes, Indexing Service and Windows Search?