How do meiosis I and meiosis II differ?

At the end of meiosis I, both of the resulting daughter cells are haploid (definitely not diploid). However, the chromosomes are still double-stranded. The homologous pairs have already been separated. In humans, this means that the original cell had 23 pairs of chromosomes, and the cells at the end of meiosis I have 23 chromosomes (not pairs), each of which still have two sister chromatids