also the yrs your looking at there will also be a LOT of difference in rider seating/position
I personally would rather a two stroke of a new rider position than any 4 stroke of that generation
I have a 2015 XF 7000 4 stroke
and I will tell you this, YES 100 % the extra weight is noticeable over a two stroke, IF your on bumpy trailers(think lots of modals high traffic ) and or on TIGHT narrow twisty trails
IMO they will get you twice as sore at the end of a long day than the 2 stroke of like HP models will(even larger HP 23 strokes will be less fatiguing)
BUT on good wider smoother trails, there is NOT much of a difference in ride and effort to ride them
rider seating on the newer 4 strokes is what makes them so close, older 4 strokes I think will wear you out a LOT more sooner,a s you just don't sit in such a great position to adjust for bumps and , go from sitting/standing as easy to help absorb trail bumps/chatter/mogals
and there heavier than some of the current 4 strokes
think at it like this when fully fueled up, most 4 strokes are closer to a 100 lbs heavier than NOT
than like HP 2 strokes, there is just NO getting past this weight
I like my current 4 stroke sled too, so NOT bashing 4 strokes, just being honest here
it is what it is, an extra 100 lbs is still a 100 lbs your controling period
and just to be clear a 4 stroke is NOT just turn key and go ride, you have most every basic repair as a 2 stroke, you just don't need to carry/add 2 cycle oil, but do have to do a once a yr oil change, so, costs for an oil change , as to how much 2 cycle oil you use, is maybe a wash
Top ends, on the 4 strokes do also wear out, just they can go a LOT longer than a 2 stroke(2 strokes are getting a LOT better here too, but still not the same as a 4 stroke
other wise ALL your other basic sled wear and tear and PM's are the same
clutch, chain case, tracks, skids, bearings and ???
NOW one last thing, NOT all 4 strokes are quiet, them Doo Ace motors are the real quiet one's IMO
the rest can be LOUD , and droning at times too, or have a decent performance sound to them
I personally find my sled to be kind of LOUD at SLOW speeds, but add in wind and some speed, its a nicer sounding sound to me!
so, honestly a 4 stroke only real advantage is, longer time between top ends, and well, no two cycle to carry or worry about
don't get caught up in there just turn key and go machine's there NOT