Hi Shlomi and welcome to the forum,
Typically, the difference between wholesale and dropshipping is the volume you have to purchase. Wholesale requires MOQ (Minimum Order Quantity), where as dropshipping works on single unit purchases.
Now when I say single unit purchases, a unit is defined by the supplier. Most dropshippers will define a singtle unit as a single product. For example, 1 x purple cow, but other dropship suppliers may define a single unit as a carton purchase, so you have to purchase a carton of purple cows and of course carton quantities can vary depending on what the product is.
So it really does depend on the supplier as to how they define their units, however most will define a unit as a single product (as is with newchicdropship with the post above).