It is a wonder how this is even a debate; Zygor WoW Guides has clearly got the best product going. Seeing as they have a lot invested in the WoW leveling guides community; they are here to stay. You won’t have to worry about their guides going obsolete or out of date, as they are literally a company that has put a lot of hard work and dedication into their products. Dugi’s WoW guide is not terrible and many many people love this product.. However, with free 3rd party addons as a part of their lvling guide system; I wonder how stable their product is in the long run. Nonetheless…
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.
Before there was ingame WoW leveling guides, there was just eBook PDF leveling guides & what you paid for was the questing path. As far asWoW leveling guides have come with fancy ingame user interfaces, the questing path is still the core. Both WoW guides spend endless hours researching their questing path to find the fastest way to reach lvl cap. It is pretty hard to deem one faster than the other as both produce extremely fast lvling times. The reason I wanted to touch on this area is to confirm that both are really well planned and have seemingly very little difference.
I have tried it a few times. It's good if you're new to the game. Otherwise not so much. I found I leveled slower by using it, as it's suggesting to take the longest possible route usually. Basically following roads everytime, when you could take an easy shortcut. Especially if the shortcut involves a bit of fall damage, it's out of question. The "go here" spots don't also update if you take a shortcut, and then the waypoint arrow points to wrong direction. But perhaps it has been updated since then.
I've used WoW-Pro for years and in WoD, Legion and now BfA it's been awesome for just going on auto-pilot and working your way through a zone. It has 3 levels of depth you can set, so you can set it to just do 1) the main story, main points of interest and rare mobs and treasure that aren't far off the beaten path; 2) every quest with a more thorough dive into the side stuff; 3) absolutely everything.
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.