Reproduce FCPX's H264 export video settings

Hello

I notice that for a given FCPX project to be exported, the Master file H264 export settings from FCPX's interface renders a bigger (and better looking) video than with Compressor's H264 settings. The problem I have with FCPX's export file is that, unlike Compressor, it can't support a PCM audio file, only AAC. Does anyone know what custom settings must be used in Compressor to reproduce FCPX's H264 export video settings ?

Thank you very much.