The biggest differentiator is that Pixelblaze is built around the user being able to define their own patterns, while WLED is more built around getting a turn-key setup as easily as possible. One of the downsides to the Pixelblaze, for me, has been in instances where I just want a simple thing like a specific color, or a simple fade or pattern. While you can do that on the Pixelblaze it can take more time to tweak the PB code vs. just moving a couple of sliders in the WLED interface.
The biggest differentiator is that Pixelblaze is built around the user being able to define their own patterns, while WLED is more built around getting a turn-key setup as easily as possible. One of the downsides to the Pixelblaze, for me, has been in instances where I just want a simple thing like a specific color, or a simple fade or pattern. While you can do that on the Pixelblaze it can take more time to tweak the PB code vs. just moving a couple of sliders in the WLED interface.