Clarification for R12 Install as part of combined EBS Upgrade and Platform Migration

Hi,

We are at the planning stage for an EBS upgrade from 11.5.10.2 to 12.1.3. At the same time we will be migrating from our existing App & DB servers (32-bit & 64-bit RHEL 5.5) to new, more powerful servers (both 64-bit RHEL 6.5). I have found note 1377213.1 (R11i/R12: Oracle E-Business Suite Upgrades and Platform Migration) which explains at a very high-level how to proceed but have a question regarding the install of the new R12 software on the new application server.

The comment in the above note states that you can use the R12 Rapid Install media to lay down the new R12 application tier on the target 64-bit system before proceeding with the rest of the R12 upgrade. However when I look at document B31295-07 "Oracle Applications Installation Guide: Using Rapid Install Release 12", there are two main options - either performing a new install as per Chapter 2, or performing an upgrade as per Chapter 3. I am unsure which method we should follow? We are doing this install as part of an upgrade, but are installing on new