I only really had the choices of the Radrover, Volt, or Sondors back in 2016 for fat bike choices. Way more choices today compared to just a few years ago. I was picking between those three because of the most "bang for the buck" compared to mid-drive options. I also wanted to get two his/her ebikes AND needed some $$$ available for gear, accessories, lights, and new platform bike rack. First thing we did with the savings was take our Rovers to the Grand Canyon and Sedona for a vacation in November of 2016. It was so nice to ride the bike trails along the canyon rim, enjoy the views, and not have +30 tourist in every shot.
I now have +4600 miles between both rovers and the only performance upgrades were TRP Spyke brakes and Vee8 120tpi 26X4 tires. Everything else was for cosmetic or comfort (adjustable stem, cloud-9 saddle, bodyfloat seatpost, thumb throttle, BC MTB pedals, etc...). I like riding my fat tire ebike so much since purchase, I decided to stick to work commute 3-5 times a week at around 200-300 miles per month.
The only thing that I didn't like were the standard Kenda tires (loud, lots of flats, high rolling resistance, lower sustained top speed, only got around 900 miles on rear tire, and a little squirrelly on turns at higher speeds on paved surfaces).