There isn’t currently a simple (one or two card) method to do this, unfortunately.
The easiest way to utilize the built-in functions in Azuqua would probably be to turn each object into a list of objects with an object for each key/value pair. You could do this using the “Map to List” function. Then, you’d be able to utilize all of the List comparison functions in Azuqua to gather this information. Functions like Intersection and Difference would be great for generating that final output.
Generally, Azuqua has a lot more functionality for handling lists of objects than just comparing objects to each other. So, it’s easier to compare this data if you transform it into lists of objects first.