Consider not only these two examples (Ea1-5 and Ab3-70, 71) but also all we have seen until now:
   
 
Hb9-34 Hb9-42   Ca6-18   Ea4-35 Ea5-1  
Ga3-10 Ga3-20 Ga4-1 Ga4-9 Ga4-14 Ga4-18 Ga5-4 Ga6-28
   
Ka4-4 Ka4-11 Ka4-16 Ka5-6 Ka5-11   Kb4-4  

London (K) and Mamari (C) seem to have legs which mirror those of Large Santiago (H), Keiti (E) and Small Santiago (G). Large St Petersburg (P) has given us no examples as yet.

Are all these persons walking towards us? Does that explain the differences seen between the left and right legs? Why are London and Mamari different?