The ideas are quite similar, and if you know Blender’s shader editor you should be able to pick it up pretty fast, but the way they’re implemented is unique (different render engines built for different purposes) so the shaders themselves won’t export between the two. If you’re planning to export models to Unity, I’d suggest only doing extremely basic shaders in Blender (like one Principled BSDF) and saving the actual shading work for after you get it into Unity.
