Oil change

Hi, I recently bought a 2018 mx5 rf 2.0 184 hp and I wanted to change the transmission and differential oil? For the transmission I'm thinking about the original mazda oil or the red line mtl 75w80 instead for the differential I'm opting for the motul gear ls 300 75w90. What do you think?

Ps. Sorry for my english, is not my first language.