The 6. I've seen multiple reviews/ benchmarks that state this. I believe the Macworld review benchmark he made a mistake. Here is another one if you scroll down that shows this.
http://mashable.com/2014/09/16/apple-iphone-6-plus-review/?utm_cid=mash-lf-bottom
Its the same chip. Thats why the reviews are flip flopping, and why they are both so close. They are both a 1.4Ghz CPU clocked A8.