I'm about 270lbs and maybe another 20-25 lbs for rack bag, accessories, and commuter back pack. I would have to ride the 600 watt 2wd fat bike to see if it feels the same as my 750w Rover. I know my Radrover is on the extreme lower end of ebikes in general and you get what you paid for. Just not sure if the Easy Motion is worth $2000 more than the Radrover?
I have two Radrovers for about a year with around 3300 miles between them. I use them for work commuting and single track trail riding equally. I work commuted with the front forks locked out compared to open. Much smoother ride with the suspension open (on and off road) with the rover. I also have a 400mm Suntour SP-12 NCX and Bodyfloat orange springs V2.0 350mm seatpost with Cloud-9 11.5X12.5 cruiser seats. Much less vibrations hitting bottom, spine, and my upper body with the suspension seatpost and forks compared when I first rode the same routes without the seatpost and suspension locked out (still feel the vibrations in my lower legs from the pedals and that is how I know how hard the two suspensions are working).
I've experimented with PSI set as low as 12 and high as 25 with 26X4" Kenda Juggernaut and Vee8 tires. The lower PSI work best for sand and rocky/hilly terrain. Higher PSI for level is fine for single track or work commuting combo riding (+22 PSI if 100% paved roads for max speed).