John Henry Newman, The idea of a university defined and illustrated, Discourse VII.6, "Christianity and physical science: a lecture in the School of Medicine" (ed. I. T. Ker (Oxford: Clarendon Press, 1976), 356).
"richer" in the sense of having "its own [(I hesitate to say more)] exuberant sylva of phenomena" "to handle, weigh, and measure"; "more exact" in the sense that Theology operates via deduction from "certain truths, communicated directly from above" ("The argumentative method of Theology is that of a strict science, such as Geometry, or deductive; the method of Physics, at least on starting, is that of an empirical pursuit, or inductive" (355-356)).
Cf. this with, say, the more complicated account of "Physics" given by Ernan Mcmullin.