Depends what you say is "better". It's all about context really.
Works burger is 29P/56C/24F
Double down seems to be 52P/18C/37F (11g saturated and .5g trans fat)(couldn't find it on KFC Oz site)
Interestingly, none of the "normal" burgers get more than 35g of protein.
So it depends if you want a higher fat or carb option really. I think I'll give it a miss though as the last time I had one, it didn't agree with me. My body rejects KFC for some reason