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.
Well, Reservoir Dogs and Pulp Fiction have some similarities in terms of Tarantino's unique storytelling and violent undertones. But they have distinct plots and characters. So, they are connected in the sense of the director's style, but not directly in the storylines.