Guild Wars 2

Is it better to spend 200 glory on Copper chests five times or 1000 glory on a gold chest one time? Gold chest doesn’t seem to give 5x more armor pieces. What’s the advantage?

The quality tier of the items you can get and the salvage potential of said items for use in the mystic forge.

To elaborate on my above post (as it will not let me edt for some strange reason), here is more information from the wiki:

" Rewards ( http://wiki.guildwars2.com/wiki/PvP_reward )

The PvP reward system has a two-tier reward structure that involves glory and rank.

Glory is a currency that players can spend on reward chests filled with random loot, while rank is a measurement of your total accumulated glory. As your rank increases, you unlock new tiers of reward chests, and thus access to more impressive looking equipment.

_All PvP rewards are account bound, and can be stored in a collection in your PvP Locker. This means that even if you obtain items which your current character cannot equip, you can store it for later use. _

If you follow the link above there is also a table with the ranks and gear sets for each rank.