Hmmm, lets see if I can get you to answer your own question.....

You have a 9.2.0.4 database and you want to create a hot standby of it.
Hot standby definition: a duplicate database on another server (in recovery mode) that can be switched to be a fail over.

So, based off of the hot standby definition.. if you have a 9.2.0.4 database would a 9.0.1.4 database be a duplicate?