The Smiths > Morrissey.
They're just better. Whose had a great impact on music? Undoubtedly the Smiths wouldn't be as famous without Morrissey. He was the most signature component of them. Regardless, Marr was just as if not more crucial to the band than Morrissey. Arguably Morrissey's lyrics and refelction of emotion in the Smiths is what made them legendary, but without Marr's guitar riffs and writing style the Smiths would had gone no where. Without Marr I doubt the Smiths, even if they had become famous, would had lasted. Marr was a great mediator between them and took care of most of the financial business as well as helped Street in the studio. Morrissey would record and leave. Furthermore Marr was the only guitarist, something I don't think a lot of people comprehend. He had to record up to 2 to 3 tracks of guitar, and write them himself. Think of the 80s, what was more important during that time, the way the music sounded, or what the music was saying? When Marr left the Smiths died. Morrissey was replaceable, and by saying that I do NOT mean that there could had been someone better out there, simply that at the time singing and lyrics were not as emphasized as songwriting. Their biggest hit was How Soon is Now? and that sure as hell was not because of Morrissey's lyrics. In no way am I bashing Morrissey, I love him the most obviously since I am here but for the time period, Marr was definitely more important than Morrissey, it's simply that Morrissey was what made the Smiths unique, and legendary, but Marr's what made it happen, Morrissey is what made the Smiths timeless, but Marr's what made the Smiths exist.