I have a 2017 Outlander 570 Max XT, which still has the V-twin engine, just smaller, but in a 2-seater ATV configuration, so it is heavy at a little over 700 pounds dry.
I have to say, it is plenty fast and can handle any work you can throw at it, with a 2-speed tranny and power on tap it hooks up well and still has plenty to spin with a bigger stab at the throttle.
I have ridden my brother-in-law's 850 Polaris, and it is just more difficult to keep that power to the ground and sucks fuel way faster.
I ride dirt bikes most of the time, so any ATV feels slow, but the 570 makes plenty of power for climbing, speed, hills, work, etc., so anything more is just excess and significant increase in fuel consumption. Just my two sense anyway.