Assistance understanding LiDar Point Density using attached examples

whitecottonk

I have attached a pdf

Lidar_Examples.pdf

I have attached a pdf document with 3 lidar samples and their stats. I want to make sure I am understanding the data and how the statistics are read. In these examples the most dense (with most points and therefore best depiction of an area) would be the grey image. The one with the highest point density at 2454 /m2 even though it has a lower point cloud count correct?

The first one listed has a higher point cloud but that is just because it is a larger area covered. This has no effect on the sampling density, or does it?

Thank you!