This is just MY opinion, but if you really only plan on teaching group classes, and maybe some private sessions, a group fitness cert is adequate. Personal training certs are for just that, personal trainers, who work solely one on one with people. I took the ACE GFI cert and found it perfect for pole, then I took Discoveries Dance to actually get a foundation in teaching pole. From what I hear, the GFI tests are significantly easier than the PT test. I think they expect you to know more for a PT cert because you are working one on one to strengthen someone. In reality, either one would work for pole, but getting both is overkill IMO. If you get both, you then have to pay bi-yearly renewals on BOTH, which is costly. I do not know if you need to double your continuing education units too. As it is, it is EXPENSIVE to get all the CECs necessary to renew. Most trainings cost anywhere from $400ish-$1000+ depending on type. Even the magazines I get cost $15 per 0.1 CEC. Discoveries Dance is $429, which was really cheap compared to other programs out there. The aerial yoga one I'm looking at is way more expensive, plus the airfare to get there. Not to mention, the materials for ACE were $500, then the CPR cert you need to get annually. It all adds up.
I read somewhere the the ACE certs are more difficult to pass that AFAA, but that could have totally been B.S. too, lol.
I don't know anything about Vertical Joes training. When looking for a cert, make sure you can get CECs. You CAN petition for CECs but there is no guarantee they will grant them. Discoveries Dance counts for ACE. Get your fitness cert FIRST, then get the pole one.