I was wondering if there are differences in the following hairstyles because they seem very similar if not identical. A buzz cut, crew cut and brush cut. Also a flat top and high and tight.

buzz cut:
http://men-haircuts.com/wp-content/uploads/2009/07/david-beckham-modern-buzz-cut.jpg
Buzz cut - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Buzz_cut)

crew cut:
http://3.bp.blogspot.com/_bQ0SqifjNcg/SoTzKcAfZJI/AAAAAAAACm0/Z3NkqidN9lM/s400/crew-cut-hairstyle.jpg
Crew cut - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Crew_cut)

brush cut:
http://farm1.static.flickr.com/37/104861258_bec6471119.jpg
brush cut: Definition from Answers.com (http://www.answers.com/topic/brush-cut)

flat top:
http://www.theflattopcrew.com.au/www/pics/admin/entry.gif
Flattop - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Flattop)

high and tight:
http://www.crewcut.com/joc/assets/images/106784_.2073102_H2_AAA_M9927_300.jpg
High and tight - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/High_and_tight)


the first link for all of those is an image. the second link is information.