Who is good at exchanging pleasantries, Jonathan or Buhari?

The picture shows the immediate past president Jonathan exchanging pleasantries with the Cameroonian president Paul Biya during his time in office while President Buhari who's currently on a state visit to Cameroon also doing the same thing.

So, the GEJites and Buharists are comparing both leaders, who does the exchange of pleasantries with president Biya better?

Can you spot any difference?