PeopleSoft Technical person knows how to code in PeopleSoft to execute the requirement.
PeopleSoft Functional person knows the Domain i.e the Customer Business, user processes and maps them to PeopleSoft and performs the rule and the Configurations required and collects the requirement and decides what is customization or what is delivered by PeopleSoft.
PeopleSoft Techno Functional person is having the knowledge of both technical as well of Functional role. But todays world considers who ever knows peoplesoft Coding as well the Configuration in PS is a Technofunctionl person.