Honda or Yamaha Generators; which is quietest?

I have done a lot of parking in mall parking lots, and the noise not only travels across the tarmack, but bounces off the buildings for a double whammy. Not good when trying to be inconspicuous. :(

I bought the eu2000i for the low noise, pure sine wave, compact size, etc., and most definitely for the access to service across North America. Much less expensive than the Yamaha, as well.

Noise ratings:

Honda 53 - 59 dB

Yamaha 51.5 - 61 dB

(assuming same distances)