I know, for sure, that the blue nitefinders are better for the yellow ones. There is also blue and silver and blue and yellow nitefinder and just a yellow nite finder. In short, there are 3 nite finders not 2. The silver and blue is best and the yellow is worst. The newer they are, the crappier they get. Normally.
I updated the thread to include the other variant. What are the actual differences in the guns? (springs, air restrictors, type of plastic, etc.)
And, how does much does this effect performance?
Anyone can feel free to add information. Real data would be amazing. I only have the blue and silver version of the Nitefinder.