Most low-quality dubs use a single mono track (2.0 stereo). "Extra quality" implies the Hindi voiceover has been remuxed onto a 5.1 Dolby Digital track. This means when Hancock throws a whale, the splash moves from the front speakers to the rear. Without 5.1, you’re just getting noise, not immersion.
For the scene where Hancock scrawls a "graffiti logo" on the moon, the difference is night and day. In standard quality, the moon looks like a dirty plate. In extra quality, you see the lunar craters and Hancock’s crude drawing simultaneously. hancock dubbed in hindi extra quality