Pretty much comes down to wheel weight & tire size, all other things being equal. I set mine up pretty much the same as my road bikes, Bars being a bit higher. I have 2 more teeth on the rear, run road rims & it probably weighs in about the same. Geometry is slightly different. I run 32cm sewups. They
are fairly nimble for a dirt tire. Rotating weight of the tires is what I notice the most.