Fluorene is a hydrocarbon with a fused ring structure. It has only C-H bonds, which are nonpolar.

Florenone contains a carbonyl group (C=O) which is highly polar. The oxygen atom in the carbonyl group has a partial negative charge, while the carbon atom has a partial positive charge. This dipole moment makes florenone a polar molecule.

Polarity is determined by the presence of polar bonds and molecular geometry.

Therefore, the presence of the polar carbonyl group in florenone makes it more polar than fluorene.