I have read that Echo1 is actually a rebrand of A&K but, the branded parts go through Echo1 quality testing, hence, reducing the chance of getting a lemon which is common among A&K. There are also a few different internal parts from one to the other that apparently make the Echo1 harder to customize but tend to be better quality, or at least for some Echo1 parts.
::EDIT:: Sorry, I wrote A&K re brand, where in fact it is a JG re brand. ::EDIT::
Last edited by Knocturnal; June 25th, 2012 at 21:00..