Robbie Williams has compared his musical and songwriting approach to that of Morrissey and Elton John in a new interview.The pop star is set to release his latest album ‘XXV’ on Friday (September 9), which contains re-recorded and orchestrated versions of songs from across his career.Speaking to NME, Williams spoke about the lack of credit he receives as a songwriter despite penning numerous hits over the last three decades. “If you break down the maths of what I’m doing musically on a song, I do the same thing that Morrissey does,” he said.“I’m not saying in any way, shape or form that I’m as good as or better than Morrissey, I’m just saying: I do the same thing.