In my opinion, head to head, WOZ is a slightly better game than TWDLE. Now, that could change once Lyman completes the code for the game. But at this time, WOZ wins.
While the TWD Pro may punish people for making clean shots, my TWDLE does not punish you for making shots, only for missing them. Mine does not have the STDM from the Pops or the magnets except on the rare "ball is wild" exception.
The call outs can be fixed with Pinball Browser. Mine has the show voices and it makes the game 1000X better. Since TWD is on the SAM system, any issues with the call outs can be fixed with some networking or your own effort to create new call outs for the game.
Now, I do not believe that WOZ is better than TWDLE + Shadow, or TWDL + Dr Who. If you have the room for both, then in my opinion, get the TWDLE + another game of your choice instead of getting the WOZ.
But if you do get TWDLE + Shadow, be prepared to take a pinball beating. Both games can be tough as nails, but you will have quite a bit of fun learning to take that pinball beating.
Good luck!
Marcus