William Wordsworth and Charles Lamb both belong to the Romantic period.
However, their literary temperaments are different.
Wordsworth's poetry is deeply connected with nature, rural life, memory, imagination, and solitude.
His Romanticism is mainly spiritual, natural, and meditative.
Charles Lamb, on the other hand, is known for essays dealing with social life, human relationships, London life, personal memories, and urban experience.
So Statement I is correct because Lamb and Wordsworth represent two different shades of Romanticism.
Statement II is also correct because Wordsworth shows the influence of nature and solitude, while Lamb shows the influence of society.
Therefore, both statements are correct.