Honda GX engine case is black, why?

First post here!

I am looking at buying a pressure washer to replace my not so old craftsman... As a result I'm looking at upgrading to a more robust unit with a Honda or Subaru Engine and a cat pump.

In looking at a few of the models I noticed they have a Honda GX160 or GX200 engine but they are all black not the traditional red and white but they are GX series. What is the difference between the 2? I know they make GC and GC versions which are supposed to be more "residential etc"

Example here:

Maxus MX5223 - Prosumer 2750 PSI Pressure Washer w/ Honda GX & CAT Pump

Thanks for any insight. I read somewhere that the black one's are different from the red one's?

 

They got tired of red & white ?

There's no difference that I know of......