Complex sentence: Neanderthals had the same DNA-coding region of the FOXP2 gene as living humans, but are different in one position of the gene's regulatory regions, and the extent of FOXP2 expression might hence have been different in Neanderthals.
Split into simpler sentences: Neanderthals had the same DNA-coding region of the FOXP2 gene as living humans. Neanderthals and living humans are different in one position of the gene's regulatory regions, and the extent of FOXP2 expression might hence have been different in Neanderthals.