Not paying more than £500.
If this a beast might tempt me to move from note 4
Will be surprising if it's markedly better than N4 in any way at all..
Build quality,speed,camera,screen,new touchwiz...basically everything
All quite incremental over the Note 4 though I would assume.
And the Note 6 after that and then the S7 and then the Note 8...
Here it is...basically looks like as S5 with metal band and sealed glass rear.
http://www.androidauthority.com/samsung-galaxy-s6-leak-589897/
Basically look like an iP6 as you said. However nothing can look worse than the back of the iPhone with those tacky lines.
Yeah, those lines aren't Apple's finest hour when it comes to design. Wouldn't have taken a big effort to make them look a bit smarter, you'd have thought.