A somatic cell that has just completed the S phase of its cell, as compared to gamete of the same species, has :

In  diploid  cells   (somatic   cells)   during   G₁ phase, DNA content is  2C  and  chromosome number is 2n whereas in haploid cells (gamete) during G₁ phase, DNA content is 1C and chromosome number is n. S phase is marked by replication of DNA and the amount of DNA per cell is doubled i.e., it becomes 4C in somatic cells, whereas chromosome number remains same i.e., 2n. Thus, a somatic cell which has just completed S phase, will have 4C DNA content but 2n chromosome number, while the gamete cell has 1C DNA content and n chromosome number.