What is the DIFFERENCE between these 2 pictures of BRAD PITT?

Question

Both were taken in the same year 1989, but his face looks much different in both of them, what's the difference?? Thanks so much!

http://s253.photobucket.com/albums/hh73/BradGardner123/?action=view&current=normal_08.jpg

AND

http://s253.photobucket.com/albums/hh73/BradGardner123/?action=view&current=23.jpg

Answer 1

as previously stated, his hair and facial expressions

his eyebrows are bushier in the second one

and the camera angle and lighting has a lot of effect too

Answer 2

his hair looks a little longer

Answer 3

its his hair and facial expressions, im pretty sure thats is :P