There are many differences between the Romantics and the Victorians. The Romantic age preceded the Victorian Age and poets like Wordsworth, Coleridge, Blake, Shelley, Byron and Keats defined the age. This age witnessed prolific poetry writing with the themes like description of nature, the human condition and emotions. There were many important Victorian poets too like Tennyson, Robert Browning and Mathew Arnold whose major theme in poetry was religion.
The Victorian age saw the rise of prose writing with notable writers like Charles Dickens and Thackeray who wrote about the degenerating condition of society. Many women writers like the Bronte sisters, George Elliot and Elizabeth Gaskell wrote using a pseudonym about the plight of women. Both the Romantics and Victorians wrote about issues pertaining to their society.
Vitorian writers are mostly concerned with man in general while romantic writers deal with individuals. For example we see Lucy in Wordsworth's Lucy poems.