Red and blue are about the same when it comes to noise. Even yellow isn't that much louder.
It all depends on a noise threshold. At night when in the woods and the wind is still, my Yamaha can carry quite a ways. However, in the daytime with the rush of traffic noise that can make a generator inaudible from 50-100 feet away. There are a lot of variable.
I'd look at other differences first. The biggest reason why I'd recommend Honda is that they have parts available -everywhere-. Yamaha parts are harder to find, and service... well, get the service book and DIY, or expect a few weeks as it gets shipped to a depot to be worked on.
