It is always interesting to know what an imaginative genius thinks about such matters.

But it is only a biographical or a half-scientific interest.
But what we want to discover is how Browning, as a poet, felt the world of Nature.

We have to try and catch the unconscious attitude of his soul when the Universe was at work around him, and he was for the time its centre--and this is the real difficulty.
Sometimes we imagine we have caught and fixed this elusive thing, but we finally give up the quest.

The best we can do is to try to find the two or three general thoughts, the most frequently recurring emotions Browning had when Nature at sundry hours and in diverse manners displayed before him her beauty, splendour and fire, and seemed to ask his worship; or again, when she stood apart from him, with the mocking smile she often wears, and whispered in his ear, "Thou shall pursue me always, but never find my secret, never grasp my streaming hair." And both these experiences are to be found in Browning.

Nature and he are sometimes at one, and sometimes at two; but seldom the first, and generally the second.
The natural world Tennyson describes is for the greater part of it a reflection of man, or used to heighten man's feeling, or to illustrate his action, or sentimentalised by memorial associations of humanity, or, finally, invented as a background for a human subject, and with a distinct direction towards that subject.