I've heard a boot of Keith singing Love Is Strong, so I assume it's mainly his song. Would assume the two he sings lead on are his, plus Baby Break It Down and Sweethearts Together sound like his style. Out of Tears, Suck on the Jugular (blecch), Blinded by Rainbows, Sparks Will Fly, Brand New Car, and probably I Go Wild mainly sound like Mick to me. Moon is Up, New Faces and You Got Me Rocking could be either. This is pure speculation, any guesses?
Keith wrote "Love is strong", "You got me rocking", "Sparks will fly", "Moon is up", "The Worst", "Baby break it down" and "Thru and thru". "Sweethearts together" and "I go Wild" were written by both Mick & Keith in Barbados. The rest of is mainly pure Mick.