I also wanted to note that a lot of users, I found on the Web claimed Dugi’s Guide to be faster.  However, all these users had either used Zygor Guides for very little time or had not used it at all.  I have to give a point to each Dugi’s Guide and Zygor Guides as they both deliver a great lvling speed.  For all you Dugi’s guide users out there who really feel that Dugi’s Guide is faster, I will give Dugi an extra  point.  If there really were a difference, it wouldn’t be by much.
Zygor Guides is an in-game software strategy guide for World of Warcraft. Every guide comes complete with the Guide Viewer, which displays step by step instructions of what quests to accept, how to complete objectives, when to use items, and more. Our gorgeous waypoint arrow will point you exactly where to go at all times and the model viewer will display fully rendered 3D models of NPCs and objects mentioned in the guide. 

Four groups of Zygons attempted to make Earth more like Zygor: those who arrived in the 12th century (TV: Terror of the Zygons), those that arrived in the 16th century and plotted to invade in the 21st century (TV: The Day of the Doctor), those that arrived in 1909 (PROSE: Sting of the Zygons), and those that arrived in the late-20th century. (HOMEVID: Zygon: When Being You Just Isn't Enough)
1 All expansion guides are written in the Battle for Azeroth beta in order to have them ready on launch day. It's important to note that betas can be buggy and unstable and may delay and even halt our progress on the guides. Furthermore, the time between the start of beta and the announced release of Battle for Azeroth is much shorter (by about 2-3 months) than past betas. As a result, our primary focus is to have the Leveling guides updated by the launch, and only if those are complete and time remains will we work on updating the remaining guides. All guides not finished in beta will be updated post launch. You can read more about this here.
Flèche de direction – Même principe que TomTom, cliquer sur un objectif de quête crée automatiquement un point de destination. Une flèche de direction vous guide alors. Elle est verte quand vous entrez dans la zone de quête. Vous pouvez aussi créer des points manuellement en maintenant la touche CTRL enfoncée et en cliquant droit sur la carte ou des suites de points en maintenant la touche SHIFT enfoncée et en cliquant droit sur la carte. Chaque point est relié par une traine permettant de définir une route.
Handynotes et toutes ses dépendences permettent aux joueurs d'ajouter des annotations sur la carte du jeu. Cet addon est particulièrement pratique pour les collectionneurs qui cherchent à vaincre tous les monstres rares de Sombrivage ou des Hautes-terres Arathies par exemple. Il sert également pour trouver facilement les trésors, et les différentes annotations vous simplifient grandement la tâche.
Functionality is the heart of these guides, what you are really paying for.  There are a lot of aspects I could look at with regards to functionality such as; questing path; quest progression; addon user interface; bugs; performance and many more.  All that we are concerned with are questing path (speed) & user interface.  All the other aspects aren’t worth comparing as both wow guides are light in terms of system usage, both have very few bugs, and both update your quest progress in real time.