Installer vs. Cydia

[Salvacion]

So, I've been wondering, is there a difference between Installer and Cydia, or is it just a matter of preference? Is there anything that's cydia-only or installer-only?

oh, and please spare me the noob comments. Thanks.

[Four20]

I recently did a brief article about this

http://www.installerapps.com/2008/08/08/installer-vs-cydia/