How do neurofibrils differ from nerve fibers?

The two structures differ in their functions. Neurofibrils serve to transport molecules, while nerve fibers transport electrical impulses.

Neurofibrils are bundle of thin microtubules and microfilaments formed by the cell's cytoskeleton, they serve as a passage for rapid transport of molecules to and from a far end of a neuron but they do not conduct impulses while nerve fibers conduct impulses.