I think we need to look at what team Webb would be at.
If he played for the Knights, behind a guy whose a genious wearing the 7 he would get 6-7 more oppertunities per game atleast to score tries. And going by what he has done at the Warriors without much support (up until the last game where the halves finally delivered), then I think he would be better than Bowen, Inglis and co.
Brent Webb is probably the best tackler I have seen at the Warriors. The way he tackles huge forwards inches from the line is amazing. Like the Dragons game a few weeks ago.