Yes, it is possible to deploy and run FineReader Server 14 and Recognition Server 4 on the same machine. They are separate products and can function in parallel, their components do not conflict.

Installing FineReader Server 14 on the machine where the Recognition Server 4 is already installed will not upgrade or replace the Recognition Server 4 installation, and vice versa - Recognition Server 4 installation is possible on the machine where the FineReader Server 14 is deployed.