They are both great. I've had big dovii and now I've taken a stronger liking to umbies. My 18" umbie is really interactive and seems to enjoy having his head pet.
Ty prawn I just posted who's better and it's all umbee and when I ask why it's "why not" I never owning one want to know why people love the dovii or umbee more
I like the Umbee shape better than the dovii. They have more of a "face" than Dovii. (See guys - here's an actual reason for liking one or the other better.)