Charles plays the 5, something that Parker has refused to do for USAB. In fact she has never liked playing in the mosh pit down low. I remember that being an issue in 2012. With Fowles and Griner injured, Geno asked her to play the 5 and she refused. Then, when he started Catchings at the 4 a lot of LV fans were irate.
The whole "Parker refusing to play the 5" bit has already been discussed here, and that's not true.
Charles also plays the 4. Kelsey Bone plays the 5 for the Liberty, although Tina can play there as does Candace. They've matched against each other in the pros several times with both of them playing low post, and Candace dominated those matchups, so not only is she a better high post player, but she's a better low post player as well.
There is nothing Tina does on the court that Candace doesn't do better.