The difference between Bathos and Sappiness

When used as nouns, bathos means overdone or treacly attempts to inspire pathos, whereas sappiness means the property of being sappy.

check bellow for the other definitions of Bathos and Sappiness

Bathos as a noun:

Overdone or treacly attempts to inspire pathos.
Bathos as a noun (now, _, uncommon):

Depth.
Bathos as a noun (literature, the arts):

Risible failure on the part of a work of art to properly affect its audience, particularly owing to anticlimax: an abrupt transition in style or subject from high to low. banality: unaffectingly cliché or trite treatment of a topic. immaturity: lack of serious treatment of a topic. hyperbole: excessiveness
Bathos as a noun (literature, the arts):

The ironic use of such failure for satiric or humorous effect.
Bathos as a noun (uncommon):

A nadir, a low point particularly in one's career.

Sappiness as a noun:

The property of being sappy.

Examples:

"It was an old love song playing on the radio, full of sentiment and sappinesss. It made me feel alone and sad."