Surfstyle fins position (advanced thread)

Hey. I was questioning myself earlier about my new board fins position.

I always had boards with no fins options so i never tried to setup different position!

I just received my soulcraft pro model with 4 slices.
Personaly i put my two 4" fin on the external slices like on my picture

But what difference it will make specificly if i put them both in tje internal slices (the ones near the turtle)?

And if i put 2 1" fin in the leftover slices!?

I will try by myself next summer but if i can have a little idea it will be great !

Thanks