The x3 is costs significantly less, but has less power. The x3 looks like it will do the job if cruising at 15 mph without pedaling is adequate for you.
however, the x3 is not a step thru frame. You have to swing a leg over the seat.
If you haven’t bought yet, I’d recommend the Evelos. The Galaxy, Aurora Limited, or the newer Omega are all excellent choices. I’m saving up for the Aurora Limited, or the Atlas with extra battery.