Compare results of 2 different Postman collection test runs using Newman

I am considering using Newman to run some API tests using some Postman collections that I have created. I would like to run these tests against 2 different builds of our web application and compare the results to see if our current dev build would break our production build.

Is there a way to do this currently?

I was hoping to do something like the following :

Newman.execute(collection, optionsBuildA, function() {

    Newman.execute(collection, optionsBuildB, function() {

        //Read in results from build A output file
        //Read in results from build B output file

        //Compare build A results to build B results
    }); 
});

However, this causes an EventEmitter memory leak. This is the exact message I'm getting :

(node) warning: possible EventEmitter memory leak detected. 11 requestExecuted listeners added. Use emitter.setMaxListeners() to increase limit.