Question: Which has more restaurants, Grimaldi's Pizzeria or Zpizza?

Context paragraphs:
Grimaldi Group: The Grimaldi Group is a private shipping company owned by Guido Grimaldi and based in Naples, Italy.  Grimaldi operates a large fleet of ro-ro vessels.

Lamberto, Lord of Monaco: Lamberto Grimaldi (c. 1420 – March 1494) was Lord of Monaco from 16 March 1458.  He was married to his cousin Claudine Grimaldi in 1465 to secure the Grimaldi inheritance of Monaco that by the small state's constitution could only pass to male heirs.  Lamberto was of the branch of the Grimaldi family which had settled in Antibes while Claudia was of the more powerful Monaco branch.

Zpizza: zpizza (originally called z pizza and commonly known as z) is a pizza franchise based in Newport Beach, California.

Carol Grimaldi: Carol Grimaldi (née Lancieri, May 20, 1938 – April 10, 2014) was an American restaurateur and co-founder of Grimaldi's Pizzeria.

Rocco Grimaldi: Rocco Niccolas Grimaldi (born February 8, 1993) is an American ice hockey player who currently plays for the San Antonio Rampage of the American Hockey League (AHL) as a prospect for the Colorado Avalanche of the National Hockey League (NHL).  Grimaldi was drafted by the Florida Panthers in the second round (33rd overall) of the 2011 National Hockey League Entry Draft.  At the age of five, Grimaldi started to play roller hockey in California.  In 2005, Grimaldi and some of his family relocated to Michigan so that he could play against a better level of competition.

Grimaldi's Pizzeria: Grimaldi's Pizzeria is an American pizzeria chain from the New York City area with several restaurants throughout the United States.  It does not sell slices, only whole pies.  The pizzas are cooked by a coal-fired brick oven.

J. S. Grimaldi: Joseph Samuel William Grimaldi (21 November 1802 – 10 December 1832), better known as J. S. Grimaldi or JS Grimaldi, was an English stage actor, comedian and dancer, who frequently played the role of Clown in the harlequinades that accompanied nineteenth-century pantomimes.  He was the son of Joseph Grimaldi, who popularised the role of Clown in the early 1800s.

Joseph Grimaldi: Joseph Grimaldi (18 December 1778 – 31 May 1837) was an English actor, comedian and dancer, who became the most popular English entertainer of the Regency era.  In the early 1800s, he expanded the role of Clown in the harlequinade that formed part of British pantomimes, notably at the Theatre Royal, Drury Lane and the Sadler's Wells and Covent Garden theatres.  He became so dominant on the London comic stage that the harlequinade role of Clown became known as "Joey", and both the nickname and Grimaldi's whiteface make-up design were, and still are, used by other types of clowns.  Grimaldi originated catchphrases such as "Here we are again!" , which continue to feature in modern pantomimes.

Grimaldi Ministry: The Grimaldi Ministry was a Spanish government headed by Jerónimo Grimaldi which lasted between 9 October 1763 and 19 February 1777.  Following Spain's distastrous performance in the Seven Years war, Grimaldi was tasked with pushing through reforms of the navy, army, public finances and colonial administration system which he did with some success.  His government was packed with reforms known as Grillos, many of whom wanted to remodel the Spanish state to closer resemble that of Britain.

John Grimaldi: John Grimaldi (22 May 1955 – 15 November 1983) was a musician, songwriter and artist.  He was born in St. Albans, Hertfordshire, United Kingdom.  Grimaldi was educated at St. Albans Boys School, where he developed his talent for electric jazz, songwriting and art.  His career focused on the Jazz genre, although he played other genres as well.  Grimaldi formed a number of bands and wrote and performed until his death from multiple sclerosis in 1983.

Supporting paragraphs: Grimaldi's Pizzeria Zpizza
Answer: Grimaldi's Pizzeria