Create pattern of difference of two arrays of objects and apply it to another array in Javascript

I have array of two different objects (which can contain additional arrays of objects):

var array1 = [{"x":10,"y":10},{"a":10,**"b":10**,"c":10}]

and another array:

var array2 = [{"x":10,"y":10},{"a":10,**"b":25**,"c":10}]

I need "what is different on second array":

var tmp = **[{},{"b":25}]**

and now update array1 with the pattern tmp

Can someone help me on this? Your time is greatly appreciated.