Question: Which singer has released more solo albums, Robb Flynn or Mike Score?

Context paragraphs:
Nothing to Gain: Nothing to Gain is the third and final full-length album recorded by the San Francisco Bay Area thrash metal band Vio-lence.  The album was recorded in August 1990, but wasn't released until 1993, after the departure of guitarist Robb Flynn.  "Nothing to Gain" was re-released in 1997 with a different cover.

Machine Fucking Head Live: Machine Fucking Head Live is the second live album from the American heavy metal band Machine Head.  And it is the final release to include bassist Adam Duce who was fired, due to ongoing differences on February 11, 2013.  The album was released on November 13, 2012, under Roadrunner Records.  It was recorded at Central, Manchester on December 6, 2011 (except Locust & Halo recorded at SECC, Glasgow on December 5, 2011).  "The Head Cases [Machine Head's nickname for their fans] have been so intense on this tour cycle that we had to start capturing the shows, especially with technology making it so much easier to record," said frontman Robb Flynn.  "We culled some of the best nights where the band and crowd were on fire and made a badass, nearly two-hour, double live album, which is a great documentation of where the band is at, 18 years deep."

Roadrunner United: Roadrunner United was a project organized by the heavy metal record label Roadrunner Records to celebrate its 25th anniversary.  It culminated in an album released worldwide on October 11, 2005, entitled "The All-Star Sessions".  Four "team captains" were chosen to lead 57 artists from 45 past and present Roadrunner bands, and produce and oversee the album's 18 tracks: then (now former) Slipknot drummer Joey Jordison, Trivium frontman and guitarist Matt Heafy, Fear Factory guitarist Dino Cazares, and Machine Head frontman and guitarist Robb Flynn.  The unprecedented project was the brainchild of Roadrunner UK General Manager Mark Palmer and Roadrunner USA VP of A&R Monte Conner.  The album project was coordinated by Lora Richardson and was mixed by Colin Richardson and Andy Sneap.  "The All-Star Sessions" spawned one single and music video ("The End").  The DVD included with the CD purchase is a documentary of the "Making Of" the songs.  It features the sessions of the four team captains making their songs.

Robb Flynn: Robert Conrad "Robb" Flynn (born Lawrence Matthew Cardine; July 19, 1967) is the lead vocalist and guitarist for the heavy metal band Machine Head.  Flynn formed the band along with Adam Duce, Logan Mader and Tony Costanza after leaving Bay Area thrash band Vio-Lence.

Burn My Eyes: Burn My Eyes is the debut studio album by American groove metal band Machine Head, released on August 9, 1994 by Roadrunner Records.  The album's themes generally tie into the social disorder and corresponding inner tension that the band was exposed to in their native Oakland, California, reflected in Robb Flynn's lyrics, such as the Los Angeles Riots of 1992 and the Waco Siege of 1993.  The album shipped over 400,000 copies worldwide, becoming Roadrunner Records's best selling debut album until the release of Slipknot's debut album.

Live Intrusion: Live Intrusion is a home video by Slayer which was released in 1995 through American Recordings and filmed at the Mesa Amphitheater in Mesa, Arizona on March 12, 1995.  The video features a cover of the Venom song "Witching Hour" performed by Slayer with assistance from Chris Kontos and Robb Flynn of Machine Head.  It was reissued on DVD on August 17, 2010.  "Live Intrusion" received positive reception from the few critics that reviewed the video.

Vio-lence: Vio-lence was an American thrash metal band formed in 1985 in the San Francisco Bay Area.  They released demo tapes, one EP and three LPs between 1985 and 1993.  Their most stable line-up was Phil Demmel and Robb Flynn on guitars, Deen Dell on bass, Perry Strickland on drums and Sean Killian on vocals.

Zeebratta: Zeebratta is the debut album of Mike Score, the lead singer of A Flock of Seagulls.  It was released on digital download on March 1, 2014, and will be later be released on physical copies.  Two singles were released from the album, "All I Wanna Do" and "Somebody Like You".

Mike Score: Michael Gordon "Mike" Score (born 5 November 1957) is an English musician.  He is best known as the keyboardist, guitarist and lead singer of the new wave band, A Flock of Seagulls.  He released a solo album on 1 March 2014 titled "Zeebratta".

Unto the Locust: Unto the Locust is the seventh full-length studio album by American groove metal band Machine Head, released in Australia on September 23, in the UK on September 26 and worldwide on September 27, 2011.  The album was produced and mixed by Robb Flynn, and it was the band's highest charting album ever, charting at 22 on the "Billboard" 200, until their following release "Bloodstone & Diamonds" charted at 21.  "Unto the Locust" was recorded in Green Day's Jingletown Studios.  On June 14, 2011, Machine Head released the advance mix of their album track "Locust", which was included on the 2011 Mayhem Festival iTunes sampler.  This would be Machine Head's last studio album with co-founder and bassist Adam Duce before he was fired due to "ongoing differences" with the band on February 11, 2013.  It has sold over 100,000 copies in the United States.  At just under 49 minutes long it is the band's shortest album released to date.

Supporting paragraphs: Robb Flynn Mike Score
Answer: Michael Gordon "Mike" Score