Dumbbell overhead press question help

[hellomycognomen]

1.What is the main difference between palms facing forward as opposed to palms facing towards each other when doing dumbbell overhead press?

2. What is the better elbow position when pressing up: having the elbows flared out perpendicular to the body, at 45 degrees to the body, or having the elbows parallel to each other close to the body?

I've done all versions and combinations but my main concern is actual shoulder rotator cuff safety, I'm not sure if one form places more strain on the rotators than the others.

Thanks

[NaijaBoy]

Some say different variations and grips work the different heads of the shoulders etc. I say use whatever method you feel the most comfortable while maintaining proper form.