Powerfly Trek in U.S. 20 and 28 mph units?

[Expidia]

My 2022 Trek Powerfly does 20 mph assisted. My Giant does 28 MPH assisted.
I noticed the Trek sells a lesser model the Allant that does 20 MPH and an Allant S version that does 28 MPH.
Anyone know Trek's thinking as to why they sell BOTH 20 and 28 MPH versions here in the U.S.?

Their E-bikes are expensive, so why not give buyers a choice of 20 or 28 MPH in the same model one wants to buy? I don't get their thinking?

And my Giant has a smooth transition when it hits 28 mph assisted. The Trek sucks as it starts to lose assist at 18 and the transition at 20 is a "heart punch"

 

[Swingset]

I believe the difference between class 1 (20) and class 3 (28)

 

[Expidia]

I believe the difference between class 1 (20) and class 3 (28)

This is true. But I wonder if say in NY all classes are allowed even in NYC. I can understand making 20 mph models for other parts of te world whee there are 15 KM limits for E-bikes. But why not sell other Trek models that are class 3.
If I had a choice (as many of us would) I would have preferred my Trek to be class 3, like my Giant is.

Excerpt: Pedal-assist e-bikes (Class 1) are allowed in New York City. As of November 23, 2020, all e-bikes (Class 1-3) are allowed in NYC.

 

[Swingset]

I am always struck by the difference between 20 and 28 is. 28 is really fast for my old bones.

 

[Mabman]

I am always struck by the difference between 20 and 28 is. 28 is really fast for my old bones.

To me it is not so much about the Class 3 28mph law, which most e motor systems and 1x gear systems found on eMTB's would struggle to achieve on flat ground for any length of time anyway and certainly not uphill, but the ability to go 22/23mph without the 20mph cutout. When I ride with my buddy on his Class 1 he keeps up just fine on trails but double track occurs it is bye bye due to my ability to go over his limit even by 2/3mph. Anybody can point it downhill and roll up to higher speeds which is where they are of the most use (fun) anyway.

Here in the OR where I live the law allows scooters, like the ones clogging the sidewalks, to go 25mph and eBikes 20mph which should be the other way around IMNSHO.

 

[markloch]

For myself, it's the 10% of the time that I'm on a roadway, usually 25mph limit, where I'd like a few more MPH. I built a wheelset with a SRAM XD hub so I've got one less tooth on the smallest cog; that ~8% difference keeps the cadence reasonable at low-to-mid-20 mph when I'm on a slight decline and gravity lends a hand.