The title would suggest that you yourself have not tried the RNS510 matey.
I doubt that
Anyone that has owned the RNS would say that they are not happy with its features.
Maybe you could take some shots of the Elisins different screens or maybe a video so we can see first hand?
I personally haven't tried one of these Chinese copies, but I can say that just from the pictures that they look crap.
Just my opinion of course.