This is ridiculous. It's like asking "what's the hotter car? mitsubishi eclipse or ferrari f430 spyder?"
In terms of looks, Anna is a Ferrari, a world class beauty. Maria is a Mitsubishi Eclipse. A nice looking car, but you're not necessarily ooh-ing and aah-ing over it as it drives by Starbucks.
Also, Anna is arguably a more talented tennis player, although certainly not the better tennis player.