Comparing objects

Hi all,

I’m very fresh here in the webmethods space, but have been testing it various functions to see what it can do. I have a fairly standard case and I would like to know what is the best method to do this in Webmethods.

I have 2 cloud systems which I have connected to via API and retrieved a list of objects from each. Any objects that exist in System A, but not in system B; I want to create in System B. I have got stuck trying to compare the 2 lists with each other to first determine which do not exist in System B (before then creating them). My approach thus far as been using the Transform and Filter, however I suspect I may need to create a flow or custom node.js to do this?

Is someone able to assist with what the best approach is to take?