Hi,
This was just recently discussed just yesterday in Autogeek's forum (probably under Detailing 101), and I participated in the thread's discussion as I too was looking to be further enlightened, and educated with these particular products being discussed.
And I have used both UK, and DLX, IMO both are phenominal products earning mine, and many other's praises.
Dr. Pain, a member at both forums stated there at AG that he has found from experience that in his opinion he believes CP DLX to be the better product for wheels.
Now from my limited use, and experience of both products, about all I myself can say is that I strongly doubt that you could go wrong using either product, that either will protect better, and last a whole lot longer than any conventional wax or sealant made, period.
I say have both on hand, you will not regret the purchases.
Mark