Shreya Ghoshal and Arijit Singh are both popular Indian playback singers who have worked extensively in the Bollywood film industry.

Shreya Ghoshal is known for her soulful and melodious voice, and has won several awards for her singing in Bollywood films. She has a strong classical background and often sings songs in the classical-inspired genres of Bollywood music.

Arijit Singh, on the other hand, is known for his versatile voice, which can range from soulful ballads to energetic party songs. He has also won several awards for his singing in Bollywood films and is considered one of the most popular singers in India.

As for why one is more popular than the other, it is subjective and depends on personal preferences of the audience. Some people may prefer Shreya’s classical-inspired singing, while others may prefer Arijit’s versatility. Additionally, factors such as the popularity of certain films and the popularity of certain songs can also play a role in determining an artist’s popularity at a given time.