All three are related to the world of Quentin Tarantino. 'Reservoir Dogs' and 'Pulp Fiction' are two of his famous movies. While 'suitcase' might be a reference to a common object or motif that could potentially be found in his works, perhaps like the suitcase in 'Pulp Fiction' which added an air of mystery.
In 'Pulp Fiction', the suitcase was a mystery object that added to the overall sense of intrigue and quirkiness of the movie. 'Reservoir Dogs' has a more straightforwardly tense and violent tone. So the'suitcase' concept in 'Pulp Fiction' is more about creating an enigma, while 'Reservoir Dogs' focuses on the raw, edgy interactions between the characters.
There are definite connections. Both films showcase Tarantino's nonlinear storytelling and have elements of crime, violence, and dark humor. Also, the characters in both often have complex and morally ambiguous motivations.
Pulp Fiction and Reservoir Dogs aren't related. They are separate movies with their own unique storylines. But both showcase Tarantino's signature style of nonlinear storytelling and sharp dialogue.