Rod's a tool. The ONLY comparison ever made that I'm aware of is that they both covered "You Shook Me". And Jeff was probably upset that the Zep version blew theirs into the dust. I guess that would trouble me a bit too.
Hey Rod- here's one for you. It took TWO of you, you and your buddy Woody, to replace ONE member of the Faces. And even at that, the band was only half as talented afterwards. Put that in yer fuckin' pipe and smoke it.