http://www.arms-cool.net/forum/thread-39106-1-1.html
Taiwanese site initial openbox impression, vs real one...
If you can't read Chinese, the highlights are:
-TM version feels more toy-plasticky, more so than Marushin.
-RS mag can't fit in the TM
-TM is lighter than RS
-trigger pull is shorter/lighter than RS
btw I am not sure as to how the poster has a RS 5-7....not knowing where he/she is based and have already gotten hold of the TM gun...