Sorry new here and i'm sure this question has been answered loads of times before but i couldn't find it on google. Is the difference in loading times, version specific glitches, controls or just runners choice?

I'm searching for the same thing

This has already been answered multiple times on the src forums, the answer could easily be found in one of those posts. There are no differences is load times or version specific glitches, the game is the the exact same for both PC and console runners in most categories, the only exception being Farewell. One advantage that PC has is being able to bind two actions to one button to make demo button of cutscene skip button.

As squeali0 said, the levels and times are, for the most part, identical between PC and console. However, another advantage to PC is access to LiveSplit and Everest.