I've been using original POG. I use both my Rebel EXO and Graphite EXO 93 and 100 all with string ports.
So, it defies the purpose for Open Ports for me. I like the string ports better than the O Ports.
Also, stringing will be a lot easier.....
(2x) POG Mid 93 - (6x) EXO Graphite 93 & 100 - (2x) EXO Rebel 95 - (2x) Ignite