The comparison should consider which amino acids coincide (in identity and position) and which do not. It yields:
The order would be:
No, this is not definitive. This ranking is based on a part of the sequence of one amino acid, which does not make it representative of the whole genome of the species involved. We would need many more of these comparisons to make a ranking that gives definitive information on how further apart the organisms separated in an evolutionary timeline.
A part of the aminoacid sequence in Cytochrome-C protein from 6 different species is given in...