Is 8GB really worth over the 6GB?

I got the 512 version since the difference was only 70 bucks.
So the expected follow up. How did you get it for only 70$ more? For the rest of us peons, it is 250$ more (unless you preorder in Australia).
 
Huge catch is the Note 4 has a replaceable battery. If not, there would be just about zero. The industry LOVES the forced retirement curves that fixed batteries afford.