Steve Harris is known for his distinctive galloping basslines, which have become a defining characteristic of the heavy metal band Iron Maiden. He has been praised for his innovative and intricate playing style, as well as his ability to create memorable and driving basslines that perfectly complement the band's music.
Billy Sheehan, on the other hand, is renowned for his virtuosic playing and technical proficiency. He is considered one of the most influential bassists in the fusion and progressive rock genres. Sheehan is known for his fast and complex bass lines, as well as his use of tapping, slapping, and other advanced techniques.
Both Harris and Sheehan have had successful careers and have made significant contributions to their respective genres. Ultimately, it is up to the individual listener to decide which bassist they prefer based on their personal taste and musical preferences.