ok Boss you asked i'll answer...
People who are very much into the detailing of their vehicles, and find it fun and relaxing will choose EX....it has a deeper glow and is a favorite of many show vehicles as you have heard on other forums. It also has no real cleaning abilities and takes a few steps to properly prepare the surface if it's not your truck..lol.....Ex takes maintenence to keep the Carnuba glow...like using a QD that contains Carnuba. The protection goes on but as we all know, the Carnuba shine has a limited life. This product is intended for the enthusiast like yourself. It can also be layered to add more depth and glow.
The Polish with Carnuba is an AIO (all in one) product. It cleans protects and give very easy maintenence...I really like this because having twins and a new buisness i don't have the time I use to have. I've always loved spending time polishing , cleaning and waxing my vehicles for over 20+ years, but now time is not on my side and this product make it easy to get the compliments without the work....It can't be layered , but the more you use it the slicker the finish will get and the clearer the reflections of metal flakes and Pearls will come through....this product also contains a patented UV absorber different than the one in EX.
I really believe at the level of detailing many people that read these boards are more subjective than objective in terms of looks.
For those who want the best of both products, just put a layer or two of EX over the Polish with Carnuba.