Honestly, a Majority of people (gun techs especially) all say that the Echo 1 is the exact same as the JG.
But honestly, I think the only difference would be the warranty card, and I do believe, echo 1 adds metal bushings to the gearbox.
So indeed the Echo 1 would be better, but IMHO, you can buy metal bushings for 10 bucks and install it yourself in the JG MK36C, but if you prefer to have them pre-installed WITH a warranty card, go for the echo 1