Question: How was Levi Stubbs different from Kevin DuBrow?

Context paragraphs:
Lu Pine Records: Lu Pine Records was a small local record label in Detroit, Michigan, active during the late-1950s and 1960s.  The label released records by a number of artists, including Joe Stubbs (brother of Four Tops lead singer Levi Stubbs), Eddie Floyd, The Falcons and The Ohio Untouchables (later renamed the Ohio Players).

Joe Stubbs: Joe Stubbs (born Joseph Stubbles, 1942 — February 5, 1998) was an American R&B/soul singer who became the lead singer of four different groups throughout his recording career.  He was the younger brother of The Four Tops' lead Levi Stubbs.

Quiet Riot 10: Quiet Riot 10 (also alternatively known as just 10, or Quiet Riot Number 10) is the twelfth studio album by the heavy metal band Quiet Riot, which was released on June 27, 2014.  It is their first studio album since 1988's "QR" not to feature longtime and founding vocalist Kevin DuBrow in any newly recorded material, due to his death in November 2007.  It is also the band's first album since reuniting in 2010.  Although a studio album, the final four tracks on "Quiet Riot 10" are live performances taken from some of the band's final shows with DuBrow in 2007.  Love/Hate vocalist Jizzy Pearl joined the band in November 2013 and performs lead vocals on the six studio tracks.

Levi Stubbs: Levi Stubbs (born Levi Stubbles, June 6, 1936 – October 17, 2008) was an American baritone singer, best known as the lead vocalist of the R&B group the Four Tops, a group known for a variety of Motown hit records and other songs created in the 1960s and 1970s.  He has been noted by writers for his emotional, often dramatic, style of singing.

In for the Kill (Kevin DuBrow album): In for the Kill is a 2004 covers album by Quiet Riot vocalist Kevin DuBrow.  It was his only solo album before his death in 2007.  The tracks are predominantly covers of 1970s rock songs.

QR (album): QR (also known as Quiet Riot, Quiet Riot IV, or QR IV ) is the sixth studio album released in 1988 by the American heavy metal band Quiet Riot.  The album featured a major line-up change.  Singer and founding member Kevin Dubrow had been fired before the recording sessions began, and replaced by Rough Cutt vocalist Paul Shortino.  The band had fired DuBrow mainly because of comments he was making to the metal press about Quiet Riot's supposed superiority over other bands, which strained friendships that members of Quiet Riot had with those bands.  Shortino's hiring was not the only line-up change, as Chuck Wright had quit the band and was replaced by Sean McNabb.  This left the album with the distinction of being the only Quiet Riot release without DuBrow on vocals, or any other original members (until 1993's "Terrified").

Matt Starr: Matt Starr (born October 25) is an American born drummer, singer, songwriter and producer.  He is currently touring with Mr. Big filling for drummer Pat Torpey on the band's "Defying Gravity" (Frontiers Records) World Tour.  Starr performed on the 2017 release which was produced by Kevin Elson (Journey, Lynyrd Skynyrd). " ...The Stories We Could Tell" (Frontiers Records) World Tour.  In 2012 Starr joined guitarist and founding KISS member Ace Frehley.  He played drums on Ace Frehley's 2014 release "Space Invader" (eOne Records).  Starr was asked to play on the record after performing a few shows with Frehley in 2012.  He is the only drummer other than "Late Night With David Letterman" drummer Anton Fig to play on the entirety of one of Frehley's records.  The 2014 release drew comparisons to 1970's KISS and Frehley's 1978 solo album.  Starr also performed on Frehley's next release "Origins Vol 1" which featured the Free cover "Fire and Water" with KISS frontman Paul Stanley on lead vocals as well as appearances by Slash, and others.  While remaining with Frehley, in 2013 Starr began playing with Burning Rain which was formed by Whitesnake guitarist Doug Aldrich and Montrose vocalist Keith St John.  Starr has also toured with Rainbow frontman Joe Lynn Turner Love/Hate, Quiet Riot vocalist Kevin DuBrow and others.

Levi Stubbs' Tears: "Levi Stubbs' Tears" is a song by Billy Bragg.  It was the first single released from Bragg's 1986 album "Talking with the Taxman about Poetry".  The song's title refers to The Four Tops lead singer Levi Stubbs, whose music remains a source of comfort to the protagonist through years of abandonment, injury, and domestic violence.

Paul Shortino: Paul Shortino (born May 14, 1953) is an American rock singer and musician who has sung for several bands, including Rough Cutt/The Cutt, Quiet Riot, Bad Boyz, and Shortino.  He briefly recorded with J.K. Northrup as the duo Shortino/Northrup.  He has also recorded as a solo artist, writing and performing the song "E.G.G.M.A.N." as the theme for Dr. Eggman in Sonic Adventure 2 for Sega (this song was later revised by Remix Factory in Shadow the Hedgehog as "E.G.G.M.A.N. Doc Robeatnix Mix").  In 1985, Shortino recorded lead vocals for the Heavy Metal benefit project Hear 'n Aid.  The single from this project, "We're Stars" also features lead vocals by heavy metal singers Ronnie James Dio, Rob Halford, Geoff Tate, Don Dokken, Kevin DuBrow, Eric Bloom and Dave Meniketti.

Kevin DuBrow: Kevin Mark DuBrow (October 29, 1955 November 19, 2007) was an American heavy metal singer, best known as the lead vocalist of the heavy metal band Quiet Riot from 1975 until 1987, and again from 1990 until his death in 2007.

Supporting paragraphs: Levi Stubbs Kevin DuBrow
Answer: Levi Stubbs (born Levi Stubbles, June 6, 1936 – October 17, 2008) was an American baritone singer