I have been doing some research on this topic over the last few months and decided to go with the sniper tools version. Although I personally have never used either one, the sniper one to me looked real rugged and has the runs on the board. It seems to be more widely used by users on this site.
I looked at getting the new HV version with the scope level built in, but they look to big in my mind , where the st version looks real neat and robust. I will fit both level and cos indicator to the scope tube.
Just my 2 cents worth ?
With each step in the bush, you are a step closer.