Based on the 15 sec samples, I have predicted what original song each song represents (only in terms of the place they appear in the movie)
Latoo Main - Rahatulla or X Machi Kaise Mujhe - Suttum Vizhi (sounds much more towards a pathos feel, maybe the full song might give a clue) Guzarish - Oru Maalai (colourful picturisation and feel-good tune) Behka Mei - Rangola (the beats sound more relaxed here, but totally different genre used here) Aye Bachu - X Machi or Rahatulla Whereas the Ghajini theme has bits of elements that ARR used in Maricham ending bit. ARR's favourite piece which is commercially available, forms a small part of the main Ghajini theme. The Tamil viewers may find the BGM to be mindblowing, since the original was pretty jarring in most scenes. However, the tunes are more inclined to Bollywood listeners.

