>>72335Short version:
Hugo.
* Bigger community.
* More plugins and themes available.
* More documentation and examples available.
* Quite fast build and iteration times (although both are fast).
* Available in many package repos (although Zola may be available in the package repo you are using, and it's a single binary).
* Similar deployment model as Zola (single file, statically compiled binary).
Long version:
It depends on the use case. Neither is outright better or worse than the other, the choice of an SSG depends on many factors:
1. The scope of the site that you want to create. If you site has a limited scope, then you'll likely need only a few plugins. In that case, you have more flexibility in choosing an SSG, since any one of them likely has the plugins you'll need (such as a markdown to html plugin). If the scope is more broad and you plan on extending your site in the future, you may want to go with a more popular SSG (Jekyll or Hugo), since there will be more plugins and documentation available.
2. The number of plugins and themes that you want. Similar reasoning as point 1. However, if you need a lot of custom plugins that don't exist in any SSG, then you have more flexibility in choosing an SSG.
3. How comfortable you are with various programming languages. Similar reasoning as point 2. If you need a lot of custom plugins, you'll be doing a lot of programming, and so might want to pick an SSG that is written in a language that you are already familiar with.
4. How quickly you want to create a site. If you just want to build and iterate quickly, a more popular SSG might be a better choice, since you can just use a bunch of prebuilt plugins and themes for most of the heavy lifting. Granted, your site may look a bit similar to the boilerplate's examples in the given SSG in this case.
Chances are that for most people Hugo will be a better choice, just given the larger community and more documentation/examples, and the fact that many sites don't need a lot of customization (and when they do, a plugin for it is usually available).