I have a few questions regarding these three:
What is the difference between those three outputs?
Does it make any difference in how my code is processed or just how it is displayed? What's the closest one to the "real" output?
Is there any benefit from using one over another?
I know there is a question about a list of viewers (Output viewers for use with LaTeX), and what I'm actually more interested in is why do we have these choices? It seems to me that perhaps there is a reason for size, portability or something else...