What is better, Trigmaster MX3N or Yongnuo 603 for Nikon D5100?

Regarding to compatibility, hassle free, remote shutter release.
Note: I'm using Nissin Flash Di622 MarkII

Added (1). I want to use off-camera flash

I have the RF603 and it works pretty well. While I have not tried the Trigmaster, but the reputation for most of the inexpensive made-in-China triggers don't work very well - the RF603 being an exception.

One thing that led me to the RF603 is that the hot-shoe - both top and bottom - is metal rather than plastic, so it may be more durable than many of the others.

Yongnuo 603