I have the Steinel HL1620S. Very happy with it, and it was an impulse buy at the Obi at some point for about ~25€. Looks very simple and professional (those old style hard plastic German style tools with no soft rubber on it) and does 1600W. They're 44€ at Obi today.
The Snap On looks very similar. Except their 1300W is 130$ and the 1600W comes with an LCD and is sold for 487$?!? Closest Steinel equivelant with the LCD seems to be the HL2020E which is around 110€ while the much more powerful 2300W HG2320E is 127€. Though I guess the Snap On is wired differently for 120V power and you probably can't expect to pull more than ~1600W out of a normal wall outlet in a 120V system?
Steinel has made heat guns fir the US market and electrical grid for decades.
I have a Milwaukee branded digital heat gun made by Steinel that is probably 20 years old nowadays, and Steinel was making heat guns for the US market at least a decade or two before that.
The US 120v sockets in new construction are usually 20 amps rated nowadays, which would work out to 2,400 watts.
Older sockets were 15 amps rated, which would be 1,800 watts, and that is what most power tool manufacturers usually expect and work to.
Some really old sockets are spec’d at 10 amps.
You can purchase a Steinel Digital heat gun in the US for about $200 to $400 depending on the model, and the extras included.
Steinel has a line of “Industrial” heat gungs, that can easily cost $1,000 or more, although I have no clue what the difference in build quality is.