They are likely not as good as a true Honda. You would have to see who made the generator part to be sure. Also, it is possible getting parts could be more difficult. Doesn't mean these generators won't do the job though, and probably are cheaper.
Perhaps a more important question than which generator is what kind of generator? Portable, fixed, or built in? Gas, Propane or Diesel? Cleanliness of waveform required? Sound limitations? And especially, what size (amount of power in Watts)?