Dominant 11 vs. 9sus4 Chords

Dear Chris: downloaded your book today and I'm really enjoying it. The way you explain where the altered chords come from scale wise, I feel is really going to open a lot of doors for me. So thanks.

Q: I've found your explanation of sus4 chords and 11 chords quite new. I got stuck with the idea in Mark Levine's books. I've been having to read a lot of Top 40, pop and rock in a cruise band and I'm finding many 11 chords which (I'm pretty certain) are looking for a F/G voicing. I'm gleamed from this that its all context based. The wikipedia article says similar things to your book...