It's not the quantity of similarities and differences, but the nesting that argues for kinship. The best evidence is not the nesting of common coding genes, but the nesting of retrovirus scars in the genome.
[[The best evidence is not the nesting of common coding genes, but the nesting of retrovirus scars in the genome]]
This simply hsows common design and preferred insertion points that are similar in similar common design- nothign more