What is the exact difference between Fairy Law and Fairy Glitter?


From the manga and anime, as well reading their description on Fairy Tail
wiki, Fairy Law and Fairy Glitter seem very similar.

[Fairy Law](http://fairytail.wikia.com/wiki/Fairy_Law)

> When activated, a bright light envelops the area and inflicts massive damage
> on whoever the caster perceives from their heart as an enemy, leaving
> friends and bystanders completely unharmed.

[Fairy Glitter](http://fairytail.wikia.com/wiki/Fairy_Glitter)

> it is a Magic that rivals Fairy Law and is a radiance of merciless light
> that denies the existence of nearby foes.

What is the exact difference between these two magic spells?




[Fairy
Law](http://images4.wikia.nocookie.net/__cb20111128183415/fairytail/images/7/75/FL.gif)
seems to only works on people who are your enemy and is an area of effect type
of spell. This spell seems to draw from the user's internal power.

[Fairy
Glitter](http://images4.wikia.nocookie.net/__cb20120114183855/fairytail/images/b/b2/Fairy_Glitter_Summon.gif)
seems to be a single target type of spell. This spell seems to draws power
from external sources (sun, stars, moon).




[Fairy
Law](http://images4.wikia.nocookie.net/__cb20111128183415/fairytail/images/7/75/FL.gif)
seems to only works on people who are your enemy and is an area of effect type
of spell. This spell seems to draw from the user's internal power.

[Fairy
Glitter](http://images4.wikia.nocookie.net/__cb20120114183855/fairytail/images/b/b2/Fairy_Glitter_Summon.gif)
seems to be a single target type of spell. This spell seems to draws power
from external sources (sun, stars, moon).

