I feel that it's worthwhile to discuss the difference between the GB1 and GB2 streams on the neutrona wand. Positron collider.
Although GB2 was a newer movie and more special effects based, the streams were actually less refined and quality than the GB1 streams in my opinion.
The GB2 streams were just generic. Thin with an orange base. They had the distortion field in cgi when they trapped a ghost, where the ghost would be squeezed etc. but the overall stream effect was more basic than GB1.
The main awesomeness of the Ghostbusters proton stream:
In GB1 the blue sparks shot foreward and the orange beam actually shot inward in tenths of a second when fired. AND the orange stream had a black core or base to the stream, that was not there in GB2.
Black lines in the core of the orange stream in GB1 that were not there in GB2.
That's what made the beam so interesting.
This is probably superfluous but I wanted it to be mentioned with the new movie coming out.