There's no way to tell if PP stole only the early version of the TaiG jailbreak or has stolen all the updates as well. If you install the PP jailbreak, you won't have access to the TaiG updates, which are very important. It's your call, though.
For what it's worth, I recently updated to 8.3 the day before 8.4 was released so I could get in before Apple closed the signing window. Then, when Taig released the jailbreak for 8.4, I went ahead and updated to 8.4 and am "patiently" waiting on the Mac version of the Taig tool. I hope it's not too much longer!