It is continuous, uniform and eternal. It is enjoyed by the sage only. Sensual pleasure comes out of emotion. But bliss of the Soul is self-delight. It is the innate nature of the Atman.
Pleasure is temporal and fleeting.
Bliss is eternal and everlasting. Pleasure is mixed with pain. Bliss is unalloyed happiness. Pleasure depends upon nerves, mind and objects. Bliss is independent and self-existent.