Theres some very interesting differences between 9.1 and 9.2
First of all, Oracle12c is being used for the local OEE on fat clients and the deployment server. When the installer is running, it prompts where to install E1Local - so this is much better than modifying the .ini file before.
Secondly, Server Manager now requires a Weblogic (or Websphere I presume) server. We've already seen the option to have Weblogic, but OC4J has completely gone away now, so either you install the weblogic server on the deployment server OR you install Server Manager on an already-installed Weblogic server. Gradually, the Deployment Server is becoming less and less.
AES encryption on the .INI files. I haven't fully explored this yet - but we did see a certain amount of encryption of passwords on the .INI files be introduced recently. Of course the negative aspect for us CNC's is that this removes the ability to modify the INI files directly (which, since Server Manager, we're not supposed to do anyway !). Hopefully this results in reduced support calls to oracle - but I have a feeling it might do the reverse !
The Simplified Upgrade. This is going to (hopefully) be "The" way to upgrade from recent editions (like 9.1 to 9.2, etc) to minimize the retrofit. I haven't fully explored this option yet, but its interesting that there are several places where this is available (platform pack install and the installation plan).
The documents are already uploaded for Unix / Oracle - but I did notice that not all the documents are available just yet.
Remember, this is a very, very EARLY release. I'm certain theres a TON of bugs in 9.2 at the moment - they've already release Tools Release 9.2.0.1 - and I'd expect to see continued updates for a while. Any customer STARTING an installation should be going with 9.2 - but nobody should be upgrading until at least after Openworld !