From the Wikipedia We Are the World section on Remake:
It will feature production by popular producers RedOne and Will.i.am. Some of the artists in the 81-member choir are Pink, Lil Wayne, Kanye West, Nick Jonas, LL Cool J, Robin Thicke, Celine Dion, Akon, Rob Thomas, Wyclef Jean, Jeff Bridges, Vince Vaughn, Barbra Streisand, Jordin Sparks, Good Charlotte's Madden brothers, Tony Bennett, Josh Groban, Snoop Dogg, Justin Bieber, Jennifer Hudson, Keri Hilson, Jamie Foxx, Tyrese, Katharine McPhee, Sean Garrett, Will.i.am, Brandy, Carlos Santana, Melanie Fiona, Enrique Iglesias, Toni Braxton, Jason Mraz, Miley Cyrus, Busta Rhymes, Nicole Scherzinger, Nicole Richie, Usher, Julianne Hough, Raphael Saadiq, Zac Brown Band, India.Arie, Randy Jackson, Musiq Soulchild, Heart's Ann and Nancy Wilson, Fonzworth Bentley, Kid Cudi, Iyaz, Bizzy Bone, Nipsey Hussle, the Beach Boys' Brian Wilson and Al Jardine, Trey Songz, Faith Evans, Mya and Gladys Knight. [79] Other artists will be confirmed in an official press release.
VS The Original:
Lionel Richie, Stevie Wonder, Paul Simon, Kenny Rogers, James Ingram, Tina Turner, Billy Joel, Micheal Jackson, Diana Ross, Dionne Warwick, Willie Nelson, Al Jarreau, Bruce Springsteen, Steve Perry, Darryl Hall. Huey Lewis, Cindy Lauper. Kim Carnes, Bob Dylan, Ray Charles.
http://www.youtube.com/watch?v=jzw6GiqZyD0
There is no way the new one can compare. Why didn't Quincy just write a new song? How can you take this song seriously when you have Snoop Dogg, and Miley Cyruss on the same stage?