PI Upgrade 7.11 to NW 7.4
We are planning a upgrade from 7.11 to NW 7.4. After reading the blog https://scn.sap.com/docs/DOC-47645 and other upgrade guides, I need help on the following questions/scenarios to understand:
1) what is the correct path to upgrade from NW 7.11 to NW PI 7.4? Do we need to upgrade to NW 7.3 EHP1 first and then upgrade to NW 7.4
2) How to advice the customer on NW PO versus NW PI? What is the difference, if any?
3) Can we upgrade from PI 7.11 to NW 7.4 single stack ? Will it cover all functionality we have in current NW 7.11 dual stack system?