>>1721317the top brands like trek operate on a whole other level than marin. if you're looking at the bottom tier models, trek gives you a rim brake option with the fx 1, they also have higher tier models with a carbon fork and hydraulic disc brakes while the kentfield only has mechanical discs on both of its models. you can tell that the construction method is more developed on the trek like with the flat top section of the top tube instead of a simple round tube and the paint is nicer. the geometry is also different although that's not an entirely trivial thing for a layperson to analyze. the kentfield has wider tires to the point where it's almost clown-like to ride with on asphalt, this is a common feature on cheap bikes that have a harsh ride with a basic frame construction and a non-carbon fork.