Building for Steam - Shared Content possible?

I’d like to keep download size as low as possible per-platform, so that I can create disc-based redistributions or just updates to the executables without having massive rebuild times for the SteamPipe index. Is it possible for Unreal Engine to store all Content in a Content folder, like Unity?

If not, is the Content from a Windows build useable on Linux? Can I just create some sort of advanced configuration that handles the different folder stuff?