Dear Sumit,
Two of the factors which influence the ionisation of an acid are:
In these cases, you seem to be breaking the same oxygen-hydrogen bond each time, and so you might expect the strengths to be similar.
But the second criteria dominates here. The negative charge on the Oxygen is well stablized within the Benzene ring due to Resonance while there is no factor reducing the effect of negative charge on oxygen in case of water.
Thank you.