I too have the Champion. I sold my Honda eu2000i after comparing it to my buddies Champion. The sound levels are extremely close. In eco mode, the Honda is only slightly quieter (barely noticeable). In normal mode, the Champion is just slightly quieter (barely noticeable).
As for power, my buddy can run everything he has in his 24ft hybrid (13.5k AC and microwave) without an issue. I have a 2014 Jayco Jayflight 32BHDS and can run everything except the microwave on the Champion (15k AC). I was unable to start my AC with the Honda I had. I live in Arizona, so I can say the Champion is great in 100+ temps.
