I have had them both in my town.
Ankha through campsite on cycle town.
And Diana through campsite on my old main town.
I didn't really expect to like Diana but I got her so I could cycle her out since I knew a lot of people liked her.
And Ankha has been one of my dreamie's.
After having both...
I loved diana after two days of her moving in. Outside of her house was pretty, inside was pretty, and she was pretty. XP
And surprisingly she never really said many of the "mean" snooty remarks my other snooties did?

I decided within a day of having ankha she was no longer a dreamie... He constant frown... even when happy... was... not pleasing to always see. =/