I kinda agree with "Darth" Yannis
Not very agreeable to compare the two.
Roger Waters could never come up with a song like "Bike" or "Arnold Layne" for example even if he tried his damnest best to.
I like Waters - yes, he can be a tad bit depressive but his lyrical style is amazing and so are the lyrics and songs.
"Each Small Candle" anyone?