I usually don't get involved in forum discussions because most of them inevitably turn into an "I'm right, you're wrong" argument but this one seems civil and I can contribute with experiences of UK3.0..
In the coating game, it's all about durability/longevity vs ease of application. A spray "topper" is much easier and less time to apply but it wont last as long as the hand applied stuff like UK3.0, TiO2,Gliss etc. I am the type that would rather take the extra time on the front end and put something on that will last longer. I am partial to CarPro products so take this from that perspective.
Their reload is a good spray on but, like any other spray on, it won't give you the longevity of a hand applied wipe on. I really need to try Elixir.
I have done a comparison test of Gliss vs the Cquartz TiO2 version. They both exhibited very similar contact angle and slickness. But, per the data provided, Gliss is 12months whereas the TiO2 is 18+ months. Without some exhaustive scientific test, I would swear they were the same product from a water droplet and slick feel standpoint. I started years back with my personal cars using the TiO2 and got 2 years out of it with proper washing and care techniques. Side note: care and maintenance is key. No coating will perform as expected without good care habits. If you can trash clear coat, ceramic is no miracle juice. Also note, there is a distinct slickness difference between TiO2 and UK3.0 BUT the TiO2 doesn't have as good of longevity as the UK3.0. The UK3.0 is rated at 2 years. So, here is where I stray a bit and have a couple of different methods.
If its a customer with a daily driver, I suggest 2 coats of UK3.0 with reload. The UK3.0 is just more durable. Then, I teach them how to properly wash and care for it. My wash and care process includes EH2O and Reset.
If it is a toy or show car, I suggest UK3.0 topped with TiO2 (not Gliss). This gives a very durable first coat and a a pretty durable slick topper that they don't have to reapply as often. It doesn't hurt to use Reload here either. It's just another layer. Same wash and care process.
Of course there are variations of this once you explain the differences to the customer and if they want to pay more for some other combination or additional coats great. In the end, it's all about time and longevity when making your decision.
Good luck