Note  1391758 seems to point out the possibility to make use of the latter version instead of 7.10

In detail:

Version TREX ABAP Client        Minimum Version of TREX Server

(= Version SAP_BASIS)

7.30                            7.10 or 7.25

Instguides mentions only 7/7.10

SAP NetWeaver Search and Classification (TREX)

Installation & Implementation Documentation Center

while Revision notes for TREX 7.25 are released on a regular Basis (eg. http://search.sap.com/notes?id=1816417 or

http://service.sap.com/sap/support/notes/2104768 )

Checked Product Availability Matrix (PAM) for TREX compatibility with EHP7 but couldn't find TREX 7.25

Even the community generated page here Search and Classification (TREX) remains quiet about that particular release.

Any hints?