The statistic you are referring to when people quote % differences is on a protein level (in other words, genes -> proteins).Its not a very good metric and not

The statistic you are referring to when people quote % differences is on a protein level (in other words, genes -> proteins).Its not a very good metric and not used any more because it's very hard to quantify differences. See this article https://bmcgenomics.biomedcentral.com/articles/10.1186/s12864-020-06962-8 https://bmcgenomics.biomedcentral.com/articles/10.1186/s1286... Our evolutionary history is complicated because we mated with many hominins and to make things even more complicated there different degrees of mixing throughout different geographical regions. So as we (homo sapeins) evolved we mixed with these other closely related species. Chunks of our dna mixed with other hominins. > We find that approximately 7% of the human autosomal genome is human-unique and free of both admixture and ILS. Roughly 50% of the human genome contains regions where one or more humans has archaic ancestry obtained through admixture. They go on to talk about ~7% of haplotype blocks are uniquely human. The others have signatures of admixing. It doesn't mean the whole block is non-human but only that it has signatures of admixing.