A lot more. It better come with a 821 SoC, 64GB base storage, or 32GB base storage with an SD card or something. I'd jump to the S7 edge or the Note 7 right now, but rooting is a pita with Samsung's KNOX feature. I honestly just want the Pixel XL to be priced about $499 with 64GB and a decent looking design. As long as it can completely out perform a OnePlus 3 I'd get it. I really hate how the OP3 doesn't have band 13 for Verizon.
Regular Pixel is rumored to be $650 in the US. How much do you think the Pixel XL will cost?
Rooting is supposed to be a pain with KNOX. You're buying the wrong phone, IMO.