Thanks for suggestions @andrewilley. I am no longer using RG, I don't feel the need. Though I am using preamp and it very much enhances the loudness. I have realized, other player might be using some sort of equalizer setting to make the higher frequencies sound more upbeat.
I just noticed something unusual now that despite enabling the absolute volume, the option inside DVC menu like I have posted in image above will still show absolute volume to be disabled. I have tried both toggling BT and restarting app.