Champion makes a quality product and has good customer service. That said it is my belief that if you are going to need a generator all day long every day, get the Honda for the better piston sleeve. Otherwise the Champion will serve most people well.
That does not mean that Honda's are perfect. I have seen many needing repairs out here on the road including a two week old 2200. The shop charged him $185 for a tune up and told him that there was a recall on it but they did not have the parts. Poor guy is still waiting after 6 months. Luckily he now has 1079 watts of solar and doesn't care.