While I have not specifically tried any of the Enduron series. I have tried some of the CFE 223 powder in my son's 223s. Before I was loading powders such as Tac and H335, but it certainly seems the CFE223 powder does burn cleaner than the previous powders I was using. Cleaning the rifles doesn't take quite as long to get clean as I recall.
I did finally pick up a 1 lb canister of IMR4451 to try in my 300 Win Mag. As you, looking for something to help with cleaning and less copper fouling. At some point, I'll get around to testing it, as right now I have several hunts worth of 175 gr LRX bullets loaded up with IMR4350.
I'd say give it a try if you don't already have a load for your rifles and be sure to report back. Good luck!!