The Nexus 6 is more expensive than its predecessors: it starts at £499, or you can go for the 64GB model which is £549. The Galaxy Note 4 is even more expensive at £599, although you can save a few pounds if you hunt around for online deals. Of course, if you're planning to get a new contract, there's no real difference as they both cost aound £30-40 per month.
See also: best new smartphones of 2015
Why the Note 4 is better than the Nexus 6: Design and build
Galaxy Note 4: 153.5x78.6x8.5mm, 176g
Nexus 6: 159.3x83x10.1mm, 184g
The metal-bodied Nexus 6 is very much a super-sized Motorola Moto X, but it lacks the fingerprint scanner, heart-rate monitor and S-Pen of the Note 4.
Why the Note 4 is better than the Nexus 6: Display
Both phablets have super-high-resolution Quad HD displays, but the Nexus 6's is slightly larger at 6in compared to the Samsung's 5.7in. This means the Note 4 has the higher pixel density but at this level you really won't be able to tell - both look amazing.
Galaxy Note 4: 5.7in, 2560x1440, 515ppi
Nexus 6: 5.96in, 2560x1440, 493ppi
There are more similarities, too. Both screens use AMOLED technology but Samsung's SuperAMOLED screen integrates touch sensitivity into the screen. It's a close call, but the Note 4's screen is marginally better.
Why the Note 4 is better than the Nexus 6: Performance and storage
In the UK the Galaxy Note 4 has a Snapdragon 805 processor which can run at up to 2.7GHz. It also has Adreno 420 graphics and 3GB of RAM, the same core specification as the Nexus 6. Both are also 4G phones with support for 802.11ac Wi-Fi, NFC, Bluetooth 4.1 and GPS.
The Nexus 6 has great front-facing stereo speakers, but the Galaxy Note 4 have the S-Pen stylus an on-demand heart-rate sensor, a fingerprint scanner and a microSD slot.
Why the Note 4 is better than the Nexus 6: Software
Although the Nexus 6 runs Android Lollipop, there's an update imminent for Note 4 owners. Plus, thanks to Touchwiz, you can run an app in a pop-out window on the Note 4, while Split View runs two apps side-by-side.
Why the Note 4 is better than the Nexus 6: Verdict
We really like the Nexus 6, but the Samsung Galaxy Note 4 beats it in virtually every area. In practice, the Nexus 6 is too big and bulky; the Note 4 is still a big smartphone, but it's easier to handle for most people.
The Nexus 6 has great speakers and unadulterated Android Lollipop going for it.
The Note 4 has better advantages for some people, such as the S-Pen and microSD slot. Yes, the Note 4 is a little more expensive, but if you're getting the phone on contract this will be largely irrelevant.