Which is better: keystone or Leviton Quickport?

[NeverDie]

Correct me if I'm wrong, but I've read that they are not interchangeable.

 

[RAL]

My understanding is that any standard keystone will work with the Quickport plates, with the exception being if you try and put 2 keystone jacks side by side.  Many RJ45 keystones are too wide to fit that way, although there seem to be some non-Leviton keystones that will fit.  I've read a few comments from people that say non-Leviton keystones may have a loose fit, but I've also seen similar comments saying that the Leviton Quickports can also be loose.   Mostly, the issue seems to be not so much with RJ45's but with keystones for heavier cables like RG6.
 
Another thing that some people gripe about is that colors (e.g. ivory and almond) don't always match precisely across brands.
 
Here are some other threads on the topic
 
http://cocoontech.com/forums/topic/26192-suppliers-of-keystone-jacks
 
http://cocoontech.com/forums/topic/22560-leviton-quickport-decora-plus-insert-monoprice-keystones/