I go back and forth between Benchmark and DeLorme atlases.  The DeLorme versions feature larger scale, greater detail, more depiction of dirt roads and trails.  Benchmark has a more eye-friendly color scheme and layout, detailed maps for selected cities and land ownership maps (BLM, USFS, State, etc).  Somewhat frustrating as I end up with both for states I travel a lot in.  Benchmark, while not showing as many "roads" as DeLorme, it does a better job of indicating which of those side dirt roads are "primary".  Sometimes the DeLorme is TOO much detail.