I am gonna go out on a limb and say both have the pluses and minuses.
WPT is less real because you don't see the total story. You get to see more of a highlights reel than the actual poker play.
WSOP is good. But, the action can get a bit slow at times.
For polish I will have to say WPT
hands down. They production work is very good.
For a real look WSOP is what you want to be watching.
As far as impact. I do belive the WPT hands down has brought in more people to the ranks of poker in the 3 years it has been running than WSOP has over the span that it has been on ESPN.
That is just my opinion.
In the end it nice watching the WPT but WSOP is more informative an educational.