In nature the N9 is easily the best looking and feeling phone I've seen, including all iPhone models. It's not obvious from the pictures whether the case changed in any way from the N9 to the 800, but at least it doesn't look like anything major.

Here: see for yourself. http://www.nokia.co.uk/gb-en/products/phone/lumia800/

The 710 looks ok but the 800 is pretty nice imo.