Ping G15 or I15s | Golf Monthly

Hi members tried out a few clubs off each today at my local club (demos of course),both lovely clubs and was striking the ball well with both.Being an 18 handicapper does anybody think,especially the single handicappers,I should go for the g15s, they seem to be more forgiving as they have a fatter club head than the i15s,any feedback would be most welcome.