Neither of these look too good. Unless you absolutely hate the PS3 controller, I would presume that you would be getting one of these to get a competitive edge in online gaming as it is more like what you are accustomed to. However because of the dead zones this would be a terrible idea to get for that purpose. 
 
Long story short. Stick with normal PS3 controller and learn to deal with it.

 Anecdotally, I haven't heard anything good about either of those, and last time I saw them in a store while shopping for other things (namely controller of smaller size for my nephew), they looked like cheaply-make junk.
 
If you are so desperate to play with a 360 controller at all times I say just play the 360 or go with tobygw's solution of simply getting used to it. It's not like going from an exclusively motion-controlled gaming life to a gamepad - the two controllers are similar enough to warrant very little need to seek out such desperate solutions.

i can help you the most with this considering i bought 2 of them during black friday. They are made very well and in my opinion feel nicer then the xbox 360 controller. Now having said that, i tried using both controllers on cod and gta 4 and other games, the dead zones were so bad i couldnt play any games. Even in gt5 i couldnt drive my car because u have to move the stick so much and then my car would lose control. I took both controllers back and bought another ps3 controller. Its such a shame because its such a nice controller, but the dead zones are soooo bad that every game is unplayable.