Need some help for a friend (mac questionary)

i just woke up and my friend has some news. his dad will get him a mac only if he can on paper write some things that prove that mac is better then windows or he does not get a mac.

remeber no jokeing and stuff be real make good points i really want my friend to have a mac:)

also if you could post any design firms that use only mac that whould be cool to (post the link)

thank for your time:)