Hi,
it depends on your purpose - however in general for detailed textures are better file textures, however for some quick effects procedural textures are useful.
Procedural textures are sampled from Maya (EVERY TIME when changed or scene is loaded) - for larger resolutions it can take a lot of time.
In FurryBall all textures are uncompressed in memory, so memory is same for 1024x1024 x 8 bit file texture and 1024x1024 x 8 bit procedural texture. However procedural textures are sampled with all UV transformations - so if you have for example checker with 100x100 tiles, resulted image will be 100x100 rectangles in 1024x1024 pixels. If you use 2x2 checker in file texture with same tiles, you will have better resolution and also better memory (you do not need 1024x1024 file image for this example).
For your wall it is better to use file texture (you can also use tiles). Also layered texture are supported by FurryBall, so some effect can be created by this.
I don't know if you can bake texture directly from Maya (probably yes, maybe some plugin exists for it?), however you can do it by some workaround with FurryBall bake texture node - create plane with lambert - insert your texture into incandescence, set diffuse to 0 and bake this plane into texture
