I guess it comes down to the clearance between the tires and the wheel coverings they have. The two front wheels have independent axles, so they might actually be better at handling bad terrain than a fixed axle. Maybe...
I'm definitely curious to how this vehicle might go on frost/ice with it's 3 wheels. We've already got a farm ute that I'd probably use on bad weather days, but I'd want to know how it handles in case I get caught out.