Thanks -- this helps. I'm a 30 inseam.
After I bought my first ebike, I learned that a bicycle inseam is different from a tailor inseam. I wish they didn't use the same word. A bicycle inseam is how high you can straddle. I usually wear 30 inch pants, but I can straddle 35 inches.
I bought a Radrunner 1, partly because I was led to believe the fat tires would be good on snow or mud. It's disgusting on snow or mud. When I steer, the lightly loaded front tire rides up onto the slippery surface and slides sideways. I was able to get by, by reducing the pressure to 10 psi so that the cross section of the tread against the surface was flat instead of rounded. However, Radpower says low pressure is unsafe. It's not good for those tires. The rolling resistance is high and the handling is bad.
Other tires might handle low pressure better, but there's little choice to fit the Radrunner's wide rims.
The Aventon Abound looks very good to me. The tires are 2.4 inches wide, which should mean higher loading and less side sliding. If it turns out that they don't handle low pressures well, there are plenty of options to fit those rims.
The seat tube angles back at 63 degrees from horizontal, which means the seat goes back almost an inch for each two inches you raise it. That helps it fit long and short legs. It has a drop seat, which means you can set it high for good pedaling but immediately lower it several inches for stability. The handlebars are quickly adjustable over a large height range.
It's designed to carry 440 pounds. There are huge panniers to go on the back rack, and it comes with footboards that support the panniers.
It has a 750 watt motor. I thought that was illegal in Canada, but Canadian dealers offer them.
I don't know what I'll do with my perfectly good Radpower bikes, but I think I've talked myself into buying an Abound!