I have NO idea dude. I just know they look to be very nicely packaged, and I'll trust Toyota-tested factory parts/systems over aftermarket parts any day of the week...
I'd probably put the inverters that come with these vehicles - stock - in the same category as the audio equipment installed from the factory. Does the job, and reliable, but depending upon what you need, there are far better aftermarket options (sometimes at better prices, too).
For a Muducation about pure sine vs mod sine inverters, start here: https://forum.ih8mud.com/threads/pure-sine-wave-inverters.257090/