array lookup vs get

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';

	myArray = ['zero', 'one', 'two'];
  myIndex = 0;

  myMap = {'yellow': 'lemon', 'green': 'lime'}
}

helpers.lookup\.js

import { helper } from '@ember/component/helper';

export default helper(function arrayLookup([array, index]) {
  return array[index];
});

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
lookup helper: {{lookup this.myArray this.myIndex}}
<br>
lookup helper: {{lookup this.myArray 2}}
<br>
lookup helper: {{lookup this.myMap 'yellow'}}
<br>
lookup helper: {{lookup this.myMap 'green'}}
<br>
<br>
get helper: {{get this.myArray this.myIndex}}
<br>
get helper: {{get this.myArray 2}}
<br>
get helper: {{get this.myMap 'yellow'}}
<br>
get helper: {{get this.myMap 'green'}}
<br>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}