The difference between Minoxidil and Nanoxidil is mainly the difference in molecular structure. Nanoxidil has a lower molecular weight than minoxidil. This is the reason it is absorbed better by the skin. Clinical studies have shown that Nanoxidil has much fewer side effects than Minoxidil. If you are interested, the Spectral DNC-N , Spectral.CSF and Spectral.CBD contain Nanoxidil.
Minoxidil vs. Nanoxidil (Spectral.DNC-N) As Compared By A Dermatologist - YouTube