EP 9 TEV conventional or Balanced Port Sporlan HVACR Podcast

Ive Got requests for this, what is he difference between Conventional and Balanced Port TEVs? Why use one or the other. Why do we have each? See pg 10 and 13 for the different pin and port types. https://www.parker.com/literature/Sporlan/Sporlan%20pdf%20files/Sporlan%20pdf%20010/10-9.pdf?elqTrackId=8A3F7F73BB44E2DF0EA18A056317F297&elqaid=9988&elqat=2