Ten poems are ancient poems. Because ancient poems can be long or short, ten seven-character ancient poems are rare. For example, Lao Lao (Tang and Li Bai).
Seven-character metrical poems are seven-character metrical poems. Generally, there are seven words in each sentence and fifty-six words in eight sentences. Generally speaking, every sentence is rhymed (the first sentence can be bet or not), and the rhyme remains unchanged at the end. Ten seven-character poems are not seven-character poems, but seven-character ancient poems. There is no strict restriction on the prosodic format of the number of sentences, so they are more flexible and casual.