Well I guess that by now (120 days later) you've probably made a choice, lol. I am new to owning a PBC but have had Kamados for some time now. Although NOT an Akorn, they all cook the same it's just some are built to last longer than others. The Akorn can make fine food but it will not last for more than maybe 3-5 years before you have issues with the bottom ash tray and it's seal and it's not insulated very well. An alternative would be to find a Big Steel Keg/Broil King Keg (which are what I own). Sometimes you'll see them on Craigslist for cheap. If you can't find one, then by all means buy the Akorn!
As for the PBC, it's a cool gadget too. Makes great food but you're going to see a REAL difference in the food that comes off of it as opposed to a Kamado. It will have a much stronger charcoal taste than food coming from a Kamado. Partially because of Kamados using lump instead of charcoal briquettes and the other reason is that as the meat hangs, it bastes itself and the juices fall into the coals and that makes more smoke. Both make great food but they will taste different. As for longevity, I think that it's a draw but maybe a slight edge to the PBC. As with all grills, keep them covered and they'll last much longer.
Hope that helps! I guess I could've checked to see your other posts to see if you ever made a decision and what you ended up with, I may do that after I type this, lol. Either way, this info may help anyone else who decides to click on this thread!