JSFiddle - React, Tailwind, and code Playground

JavaScript

var a = [{c:1, r:2}, {c:2, r:2}, {c:3, r:2}];
var b = [{c:1, r:1}, {c:2, r:2}, {c:3, r:3}];
var c = removeCommon(a, b);

console.log(c);

function removeCommon(a, b) {
    var result = {};

    a.concat(b).forEach(function (i) {
        result['c' + i.c + 'r' + i.r] = i;
    });

    return Object.keys(result).map(function (k) {
        return result[k];
    });
}