Which preposition to use with intenser

than Occurrences 2%

In the background were hazy hills, white Birches bare and snow-like, and a Maple half-way up a sheltered hill-side, one mass of canary-color, its fallen leaves making an apparent reflection on the earth at its foot,and then a real reflection, fused into a glassy light intenser than itself, upon the smooth, dark stream below.

in Occurrences 1%

"You mean to say," speaking with irrepressible excitement, while the wrathful light gathers and grows intenser in the gray depths of his eyes, "that thisthis interview never took place?

Which preposition to use with  intenser