Ok so a modified sammy vs a stock atv may be able to go through deeper mud or snow like I said, but thats about it. If you mod the atv it will also go through deep snow and deep mud. But in the end the atv will still go places that the sammy can not. I have off roaded for many years. With trucks and atvs, and there will be some situations where the sammy may come out ahead, but not many. I have been off roading with people that have modified sammy. I have seen sammys hill climb, mud, and run the trails....Its not the same.
Get the sammy for the heat and protection from the weather, because with just the addition of some decent atv tires, and the sammy will be no where to be found.
I understand one thinking that the sammy rules the off road, but post this same topic on an atv site and you will get laughs from everyone. Like I said the Rubican Trail can be done on a stock atv. A stock sammy will not be found. I have been to Coal Creek in TN (Windrock) many times. I have easy transversed trails that the rock climbers needed spotters and what seamed like hours to to get through. Then you can venture down trails at Coal Creek that no trucks, trackers, or sammys go down or up. Only the atvs, a few nuts on bikes and bulldozers dare travel.
Been to Windrock MANY times on ATVs and with a capable Tracker.
Some trails my Tracker will do that I couldn't go with my Sportsman, some trails were too tight for the Tracker..
It's a trade off, but in the REALLY rough stuff, I would take my Tracker hands down over a quad. But, on tight trails, you can't even get to them with a Zuk, much less make it through.
I have also been off roading on quads, trucks, and now Zuks for years and years and years.
I can take my Tracker up and down drop offs that NO atv can touch, unless you jump them I guess.. lol.
I can take my Sportsman through places that no Zuk can touch. It's all a matter of the trails.
I guess to answer the question posed, YES! A zuk is a great replacement for a quad, especially when you get old and tired of getting cold and wet and muddy.
BUT, I personally have had many Sammys turn around and not be able to follow my Tracker.. happens all the time. Trackers are amazing