Lidar contours should be much more precise (though that depends on good quality data processing before you get the data). Also what is precise is not always what you see therefore contours by eye can be more "accurate" from an orienteering point of view.
You would think. In the open areas Dave's contours wander up and down to pick off the features, but there is a quarry area where the lidar makes no sense. Almost as if its picking out the terrain as it was before the quarry (which is 50+ years old)
Hmm, sounds interesting! shame I can't visit to check it out :-)
art, not science. Always has been, always will