So what's your alternative explanation for all this? You say...what? It's because of a necessary similarity between similar organisms? But out of these 76 sites with informative differences, only 18 involve differences that change the amino acid composition of the protein; the rest can have no effect on phenotype. Further, many of those amino acid changes are to similar amino acids that have no real effect on protein function. In fact, ND4 and ND5 do exactly the same thing in all organisms. These nested similarities have nothing to do with function, so similar design is not a credible explanation.
...great minds...