Mortal Kombat II and The Devil Wears Prada 2 are locked in a tight race for the box office crown this Mother's Day weekend.

New Line's Mortal Kombat II and 20th Century Studios' The Devil Wears Prada 2 are each pulling in $40M-$42M, with Saturday numbers offering no clear winner. Industry insiders say Mother's Day Sunday will determine which film finishes ahead.

Mortal Kombat II brings action-packed brutality to multiplexes. The Devil Wears Prada 2 is delivering fashion and sass in its second weekend, suggesting strong audience appetite for the sequel.

Both films show staying power. The Devil Wears Prada 2's strong second-weekend hold indicates the fashion-forward sequel has legs. Mortal Kombat II is proving that video game adaptations can be box office winners when executed properly.

The Mother's Day angle adds unpredictability to what is already one of the tightest races of the year. Families will choose between brutal fight choreography and the glossy world of high fashion.

Whoever wins will have bragging rights for years. The two films are separated by fractions of a percent, making this one of the closest box office contests in recent memory.