For the Nintendo Switch specifically, Mortal Kombat 1 is widely considered a sub-par port regardless of how it is acquired. The Premium Edition adds characters to a struggling engine, offering questionable value for the price. Conversely, the "free" alternative offers zero improvement in performance and removes the game's longevity through the loss of online play.
The Premium Edition of Mortal Kombat 1 is designed for dedicated fans who want the complete experience from day one. On the Nintendo Switch, this digital or physical bundle includes several high-value additions that set it apart from the Standard Edition: mortal kombat 1 premium edition switch nsp better free