You can get that at Home Depot and Cabella's for the same $719.
It certainly should be quieter, since it's an 80cc engine versus Honda's 98.5cc engine. It bothers me (well, more like it's hilarious) that they won't list the decibels for the unit, flatly stating that they're is no standard for measuring generator dB levels, yet they say theirs is quieter than the Honda based on third-party ISO-9614 lab tests, which are the standards for measuring generator dB levels. And if you look at the test results you can see the Generac is indeed quieter (70.7 versus 69.7 @ 50% load). But hyping up "Hey! We're 1 dB quieter than the Honda, which is the smallest difference the human ear can detect!" is pretty lame advertising. It's literally the difference in the sound of a window air conditioner at 9 feet versus 10 feet. So, the generic Generac "quieter" it is!
Both the Generac and the Honda have a 3 year warranty, so that's good. And both use the same oil and maintenance schedules.
The Generac is rated at 7.7 hours @ 1/4 load while the Honda is 8.1 hours (24 minute difference). That's $0.005144 per minute for the Honda versus $0.0054112 for the Generac. At $2.50 per gallon (do not use ethanol gas in either), at 2000 hours, the Honda will cost $617.28 in fuel and the Generac will cost $649.34, a difference of $32.86 over the typical realistic minimal lifespan of the generators.
The Honda at $999 and the Generac at $720 is a $279 difference, making the Generac {279-32.86} $246.14 cheaper over its life time.
Generac's initial foray into the portable inverter generator market was a disaster, mainly because of was just another rebranded POS China generator. Their current line of these generators are designed, manufactured and assembled in Wisconsin, same as their commercial and industrial generators (all of their generators have a few imported parts). This particular generator had only been in the wild since last fall, but the engine and inverter has been in models long enough to know they hold up and are high quality. The only thing really new with this one is the electronic controls.
The bottom line important difference between the Honda and the Generac (other than the price) is the Honda can directly charge 12 volt batteries with 8 amp DC output while a separate battery charger must be used with the Generac. That will be a deal breaker for some, but not really much of an issue for most.