What are the differences between MD2 and MD3 format?

What are the differences between the MD2 and the MD3 model format, and which should I use?

for info on MD2: http://www.ugrad.cs.jhu.edu/~dansch/md2/

for info on MD3: http://www.icculus.org/homepages/pha...md3format.html

for sample projects for both: http://www.gametutorials.com/Tutoria...OpenGL_Pg4.htm (they are the last few tutorials at the bottom of the page)

as for which one to use, which formats does your rendering software export? do you have converters? are you using premade models supplied from someone else (and if so, what format do they provide?).