In order to detail the various parameterization possibilities, here are the detailed conditions on the composition of the order basket.
They can be found in the product conditions and also in the sales animation settings.
Equal : basket must match exactly > products added to basket must be similar (no other products)
Not equal : basket must not match exactly > basket must be completely different
In : the basket must have the indicated product(s) > the basket must contain the indicated product(s) but may also contain other products.
Not in : the basket must not have the indicated products > this only works if the indicated product is not in the customer's basket.
Contains : the basket must contain one of the indicated products > if you have chosen two products, the basket must contain at least one of the two products and may contain other products as well.
Does not contain : the basket must not contain any of the indicated products.
The conditions "Contains" and "In" therefore have the same applicability if the condition refers to a single product. They diverge if there is one or more.