Adding SRU vs installing SRU initially

Scenario: A company orders new equipment a year later than initial installation of other servers running Solaris 11. The servers from a year ago were installed with Solaris 11.3 SRU 11.3.7.5.0 (entire@0.5.11,5.11-0.175.3.7.0.5.0). Since then, we have installed SRUs and have updated to SRU 11.3.16.3.0

NAME (PUBLISHER)                                  VERSION                    IFO

entire                                            0.5.11-0.175.3.16.0.3.0    i--

Now, my question.

Is there any reason not to install the new servers directly with the current version of Solaris 11.3 SRU 11.3.16.3.0 that we are running on the older servers? Our standard is to maintain all servers with the same OS level in order to keep the environment simple and consistent. Currently, the powers that be want to install the old SRU (which I might add had problems and was removed from the repository, but we still have it locally) and then pkg update to the one we are currently running on the old servers. They are afraid that just installing entire@0.5.11-0.175.3.16.0.3.0