Debatable. Fat bikes (2.6" and up) are heavier, don't roll as fast, and aren't near as snappy and precise as bikes with narrower tires. To me the 2.4 - 2.6 range is perfect. As a bike mechanic and salesman I see a lot of people buy fat bikes just because they like how they look, when in fact a standard width tire would be better. Fat bikes have their place such as in sand, mud, or just to get a smoother ride, but if your looking for precision and lower rolling resistance with less weight, don't get fat tires. They actually don't even make a fat Fuse at the present. As far as how the two bikes compare, the Marin is focused more on dirt jump/ park and slope style riding, whereas the Fuse is a really aggressive raw trail monster. If anything, the Spesh is a cleaner, slightly better build IMO.
