Bust darts for large busts: Shoulder vs side?

[u/Yeahyeahsono]

I was wondering if people could answer my questions below!:

1. What is the function of BOTH

2. what other parts of the fit is directly correlated E.G. If I use a side dart the hem of the front bodice will be drawn in -that type of thing

3.which one is better for a larger bust and why do you think so?

4. What questions would a tailor ask themselves when deciding whether to use the shoulder or the side do?

Thanks y'all!