Blacks look different

Hello,

Ive come across an Issue, I find quiet hard so solve.

My Lightroom has a different Gamma or Contrast than my Exports.

The Lowlights in my LR are detailed and are not clipping.

In my Exports these Parts look propper dark, no matter what Photo Viewer I use. no matter which OS. On my grilfriends Mac some darker Parts with slight details are really black.

I hope the difference is showing on these Screenshot. 

I´m using W10, i have a calibrated Screen with my own Spyder checker ICC profile.
The colors dont look off just the dark areas.

Can someone help me with this Problem?