Both great sets. However in my opinion.
Ping will offer a full custom fit and a better customer service.
Ping will hold their value better in the long run if and when you decide to trade in/upgrade in the future.
Yonex make magnificent clubs and are huge in the middle east/ Asian markets.
Overall though I would go with what you hit better and feel better to you as are the one playing them. Also I would suggest (if you haven't done so already)that you hit them outside or at worst on the range so that you get an idea of the ball flight as I find that the indoor nets launch monitors give a false impression of your actual flight.
