Difference is related to Vary. Vary is related to Change. Change is related to Progress. Progress is a type of Motion. 
you would Surprise because Like. Surprise would make you want to Think. 
Difference <--RelatedTo--> Vary <--RelatedTo--> Change <--RelatedTo--> Progress --IsA--> Motion 
Like <--MotivatedByGoal-- Surprise --CausesDesire--> Think 