K-map: how to decide which implicant to be prime
In terms of number of operators needed (inverter, or, and) it does not matter.

However, in a real life situation, it can depend on (just summing up things coming in my mind):


Some operator (ICs/logic/transistors (on an IC) can be more costlier or more space consuming than others, prefering one type of operator above another
Some operator can be faster than another, prefering the faster type above the other
Some operator ICs come in multipliers of 2, 4 or 8 and having an exact (or almost) number of one type of operator can favor into another. Example: if you can chose between 5 not operators and 10 or operators, and an each IC has 8 operators, you need three. But if you can have a different formula that has e.g. 7 not operators and 8 or operators, you need only 2 ICs.