Comparison between Champion and Honda generators

I am comparing a Champion 9000 trifuel inverter generator with a Honda 5200 generator. The Champion is rated 5900 watts with natural gas and the Honda is rated 5000 watt. The load is varied between no load and 4500 watts with both generators in eco mode. The Honda shut down with the highest load by itself. Note that the frequency of the Champion is rock solid at 60.0 Hz. The Honda varied between 50 and 60 hertz. Also the Champion voltage was never more than 2 volts from the 120 VAC nominal voltage. The Honda varied with load, going down to 85 volts at no load.