Will Episode Select alter my choices if played all the way through?

I have recently beaten Until Dawn for the first time and would like to go back and get the rest of the trophies. Unfortunately, I pulled down an outdated save file from the cloud which was near the beginning, so I didn't get a chance to try the Episode Select feature for myself.

I plan to play this game two more times, a perfect file and no-survivor file, but I'm having trouble deciding which to play first now that I have deleted my previous save. I understand that, after unlocking Episode Select, I will lose my collectibles if and only if I select New Game, but I am concerned about how Episode Select will affect my choices.

If I use Episode Select to play from the very beginning until the very end, will my choices from my first playthrough be overwritten or will subsequent uses of Episode Select still fall back on my first choices?