I have never used the Pizza Que so this is not based on personal experience, but I've never been interested in the concept of a stand-alone, propane fired pizza oven. I'm sure it makes decent to good pizza but my goal with making pizza continues to be reaching extreme heat levels while also using real hardwood to impart a nearly authentic wood-fired taste to the pizza. I have owned the Kettle Pizza for several years and I can vouch that there is a definite learning curve to it, but once you have it dialed it in it is the very next best thing to having a true Neapolitan wood-fired oven in your backyard. It is not the same or as good, and I am not implying as much, but for the cost it is a ton of fun and you can turn out some great pizza with it.
I understand the draw for the portability of the Pizza Que and if you are interested in something to haul around to tailgate or something it might make sense. But I would equate it to a gas-fired grill. It is fine and has its place, but there is a reason we all love cooking over live fire so much more than over gas.
If you are looking for ease of use and portability the Pizza Que is probably right in your wheelhouse. If you want to have some fun tinkering and can handle a few disasters on the way to the best possible pizza you can turn out without a brick oven go for the KP.