Inconsistent audio devices name

There is different way getting list of audio devices.
One is using QAudioDevice::availableDevices(AudioInput), the other is using QAudioRecorder::audioInputs().
Both lead to different device names being produced.
In the first one, it seems to report both pulse audio and alsa devices, while in the second it report only pulse audio devices.
Also, the pulse audio devices are not named the same.
The doc also does not claim if interchanging devices name is OK or not.
Please advice.

This is Linux/X11/gstreamer backend.