It is a good question. I can't tell you which is better than the other. Laravel is a good framework. Currently Laravel will be a good choice since it has a big ecosphere and support.

We create Windwalker just because we want a high performance framework with a bundle system like Symfony, we don't love too many static Facades in Laravel. And we all familiar to Joomla style for a long time.

I believe developers will choose what they like or familiar to, not for the one which is more powerful.

But there is still something Windwalker do better than others, please see: http://windwalker.io/about/features.html

And you can also consider Windwalker packages if you think it is useful, for example, if you want to use Blade out of Laravel, Windwalker Renderer will help you: https://github.com/ventoviro/windwalker-renderer