For development purposes, do the Linux and Windows versions share the same code?

Hello again.

My ordinary Operating Systems is Windows, but I recently had to set up an Ubuntu partition for a Qt-related project I'm working.

Given that I've had so many problems trying to set up Qt Creator with Musescore on Windows, I'm considering using Ubuntu instead. If I did this -- and if I wanted to later use my changes on Windows -- would my work on Musescore Linux convert back to Musescore Windows?

Are there any major differences in the code that I should be aware of?