I think that although the WWE does not allow their divas to show the full extent of their wrestling ability (e.g. Jillian was brilliant but never allowed to show it), and they do have some talented wrestlers such as Gail Kim and Natalya...I much prefer seeing the Knockouts in action.
I certianly think Gail Kim will end up back in TNA once her contract in WWE expires, her considerable skills are criminally wasted in the 'E and back in TNA she could show us all again what she can do. TNA had an awesome womens division (including Gail) a few years ago, but then it declined but now is on the up again, and it was great to see Tara and Mickie locking up in a cage in the main event of Impact. It was a great moment for womens wrestling, and one I cannot imagine seeing in the WWE again.
Now comparing the women.... TNA has Mickie, Angelina Love, Velvet Sky and Madison Rayne, who are all gorgeous and good in the ring, and of course my favoruite Tara
, while WWE has Natalya, Melina, Layla, Gail and Beth who are pretty much a similar standard, although I reckon TNA has the edge slightly. It is more down to the booking and limitations WWE set on their performers.
However, I think it is just the way the women are booked. While TNA may have the slightly more talented female roster, just allowing them to wrestle as well as they can and pushing some feuds with enough airtime rather than quick 4 minute diva matches makes TNA the winner in this for me. If WWE let Beth, Gail etc go 100% maybe the result of this would be different, but for now I am going with TNA. They have Tara