Minoxidil alopecia products now come in foam type. You can say that the comparison is only on how they are applied. Foam products are easier to use because all you have to do is spray it on the affected area. It does not have that greasy feeling that you get from using topical solutions. Another advantage is that it does not leave any residue. The residue that topical solutions leave tends to dry up and flake and this may look like dandruff to some people. You would have to remember to shampoo after using the topical product to avoid having dandruff-like stuff falling from your hair. The most important advantage of using foam products is that you don’t have to use your hands when applying them. This eliminates the possibility of causing eye irritation if you accidentally rub your eyes. So go and buy your own foam type minoxidil product.