I think Neville is many levels above Carragher.
Carragher struggles to complete sentences satisfactorily, much like Jamie Redknapp; I find myself cringing when they are trying to make a valid point (although they are nowhere near as bad as Robbie Savage)
Neville is eloquent, and is well-versed in the tactical side of the game as well.
Yeah seriously. I think he's more balanced and analytical than Neville now. I think since Neville had his Spanish internship he's come back a little bit stale. Even though he's more articulate than Carragher hes lost maybe some empathy and impartiality that he had before.
That's not say he's not very good either, just think Carragher is the better one at present.
Oh and I'll not hear a bad thing about Savage. Top fella in all aspects away from punditry!