Concerning hair growth, I've experienced something really weird. Actually, I started to know something was weird when people talked about the length of my goatee.
Since I had started to grow my hair 4 month before I decided to grow my goatee, I thought that people would rather notice my hair.
So I investigated and found out that:
-my hair had been growing at an average rate of 0.6 inch/month (precise isn't it)
-my facial hair (goatee) had been growing at an average rate of 1.3 inches/month !!!!!
Such a difference..I mean, facial hair touches my hair on top via sideburns.There's no obvious border...
Another trick of mother nature.
Beard hair probably gets more wear and tear.
Beard hair grows faster because you shave it so much you cut your hair alot less then you do your facial hair!