Image quality is similar to 808 (on auto), but much bulkier. Camera launch speed, photo process time is much quicker. OS is modern although I still prefer old Symbian to Android. Overall a better "phone" than 808 and similar camera quality. There is a very nice comparison here.

Interesting comparison. I personally prefer 808 to the 1020. I don't like OIS on 1020, it easily makes photos too bright and unreal, also it has more green/yellow colour. And on the mobile phone side, WP is pain to use, Symbian doesn't have a lot apps but generally better to use. Plus removable battery, sd card support, ND filter and fm trasmitter makes it the overall winner to me. I bought 2 808s.

Disagree on your close up comparison: On 808/1020 because there is a minimum focus length, you need to switch to pureview mode (8MP/5MP) and zoom in to take close ups. They won't be worse than iPhone 6+. (iPhone 6+ is very good on close up indeed.)

For overall image quality I feel 808=CM1>1020>iPhone6+>Z3.

CM1 has a lot of manual settings which I still not familiar with. And I haven't used RAW output yet.

After using the CM1 I was surprised how good 808 is - Tiny size, weak chip, powerful camera.