Question: Which artist has been a member of fewer musical groups, Curtis Wright or Paul Di'Anno?

Context articles: Orrall &amp; Wright
Killers Live at the Whiskey
Gogmagog (band)
Paul Di'Anno
List of Iron Maiden concert tours
Curtis Wright
Di'Anno (album)
List of Iron Maiden band members
Di'Anno
List of songs recorded by Iron Maiden

Orrall & Wright was an American country music duo composed of Robert Ellis Orrall and Curtis Wright.
 Both members had recorded solo albums and had charted singles of their own prior to Orrall & Wright's inception.
 As Orrall & Wright, they charted two more singles and recorded a self-titled album on the Giant label.
Killers Live at the Whiskey is a live album by the former Iron Maiden singer Paul Di'Anno and his band Killers.
 The album was apparently recorded at the Whisky a Go Go club in Los Angeles however it is suspected that it was recorded in the studio with crowd noise mixed in the recording.
 The exact recording date is unknown.
 The title of the CD has been misspelled as the name of the club is actually written without the "e".
 The album contain songs from Di'Anno's solo career and four songs from his back catalogue with Iron Maiden.
Gogmagog were a British supergroup put together by British record producer Jonathan King that featured former Iron Maiden members Paul Di'Anno and Clive Burr, former White Spirit and Gillan guitarist Janick Gers, Def Leppard guitarist Pete Willis, and bassist Neil Murray (Whitesnake and other bands).
 Two of the songs recorded were written by King; the third by composer Russ Ballard.
 Originally, the supergroup was to contain David Coverdale, John Entwistle and Cozy Powell, but this line-up "wasn't working out", according to Di Anno.
 He also insisted that he hated the finished product and that he "only did it for the money".
Paul Andrews (born 17 May 1958), better known by his stage name Paul Di'Anno, is a British singer best known as the first vocalist to record with heavy metal band Iron Maiden, from 1978 to 1981.
Iron Maiden are a British heavy metal band, founded in 1975 by bassist Steve Harris in London, England.
 After several personnel changes in the 1970s, the band settled on a lineup of Harris, Paul Di'Anno (lead vocals), Dave Murray (lead and rhythm guitars), Dennis Stratton (backing vocals, lead and rhythm guitar) and Clive Burr (drums), before they set out on their first professional tour, the Metal for Muthas Tour which supported the compilation album of the same name.
 After taking on a supporting slot with Judas Priest on their British Steel Tour and setting out on their own headline tour in support of their debut album, "Iron Maiden", the band supported Kiss on the European leg of their Unmasked Tour, following which Stratton was dismissed because of musical differences.
 Guitarist Adrian Smith was hired, following which Iron Maiden set out on a short series of UK dates before recording their second studio album, "Killers".
Curtis Blaine Wrightt Jr. (born June 6, 1955 in Huntingdon, Pennsylvania) is an American country music artist.
 He made his debut in 1989 with the single "She's Got a Man on her Mind" on a branch of MCA Records, before recording a solo album in 1992 on Liberty Records.
 By 1994, he and frequent songwriting partner Robert Ellis Orrall had formed a duo known as Orrall & Wright, which also recorded one major-label album.
 Wright later succeeded Brent Lamb in 2002 as the lead vocalist for the band Shenandoah, until being replaced by Jimmy Yeary in 2007.
 He has toured as a member of Pure Prairie League as well.
Di'Anno is the 1984 self-titled album of the band of the same name.
 The lead singer Paul Di'Anno had been the frontman of the British heavy metal band Iron Maiden for three years, before being dismissed for his erratic behaviour.
 The band bearing his name and playing very commercial heavy rock was his first and short-lived solo project.
Iron Maiden are a British heavy metal band formed in 1975 by bassist Steve Harris.
 After several lineup changes prior to their recording career, they settled on Harris, vocalist Paul Di'Anno, guitarist Dave Murray and drummer Doug Sampson.
 The band released an EP as a four-piece, before hiring guitarist Dennis Stratton in 1979.
 Doug Sampson was dismissed from the band as he was unable to cope with the touring schedule and, at the suggestion of Stratton, replaced by Clive Burr, with whom the band recorded their self-titled debut album in 1980.
 Later that year, Stratton was replaced by guitarist Adrian Smith, due to musical and personal differences brought about by choosing not to travel with the band when supporting Kiss on the European leg of their Unmasked Tour.
Di'Anno was a band featuring former Iron Maiden singer Paul Di'Anno, whom the band was named after.
Iron Maiden are an English heavy metal band formed by bassist Steve Harris in 1975.
 The band's first album, 1980's "Iron Maiden", was written primarily by Harris, with vocalist Paul Di'Anno co-writing two tracks and guitarist Dave Murray contributing "Charlotte the Harlot".
 The 1981 follow-up, "Killers", was written almost entirely by the bassist, with frontman Di'Anno contributing only to the title track, "Killers" (the North American bonus track "Twilight Zone" was credited to Harris and Murray).
 Bruce Dickinson replaced Di'Anno after the release of "Killers", although he did not contribute any songwriting to "The Number of the Beast", released in 1982, which featured three songs co-written by guitarist Adrian Smith.
 "The Number of the Beast" also spawned Iron Maiden's first UK Singles Chart top ten in the form of "Run to the Hills", which charted at number seven on its release.
 It was not until 1983's "Piece of Mind" that the songwriting process became a more varied and collaborative approach, with just four of its nine tracks being credited solely to Harris, two to Dickinson and Smith, one to Harris and Murray, one to Dickinson alone, and one to Harris, Dickinson, and Smith.
 The Dickinson and Smith-penned "Flight of Icarus" was the first Iron Maiden single to chart in the United States, reaching number eight on the "Billboard" Mainstream Rock chart.