It doesn't seem a year ago that Google announced the Nexus 5, but it was and now we have its successor: the Nexus 6 which introduces Android 5.0 Lollipop. Here we compare the two to see what's changed including design, price, specs and features. See also: Nexus 9 and Nexus Player.

Before we delve in, it's fair to say that the Nexus 6 really isn't a simple update of the Nexus 5. It's completely different, and bigger in every way. The 6in screen makes it a phablet, while the 5in Nexus 5 was just a big Android smartphone. See also: The best smartphones of 2014.

Nexus 5 vs Nexus 6 comparison: price

One of the amazing things about the Nexus 5 was its low price, despite the high-end specifications. Google hasn't yet announced the price of the Nexus 6, so it's impossible to say yet whether the new smartphone will be a bargain too. Rumours suggest it will have a price to match its flagship specs, though, $649 off contract.

Nexus 5 vs Nexus 6 comparison: design

Nexus 5 vs Nexus 6 comparison

If the Nexus 6 looks familiar, that's because it's made by Motorola and it's very similar to its own Moto X, reviewed here. That's a break from LG which has made the Nexus 5 and Nexus 4.

It's bigger, but it has the same tapered rear edges, an aluminium frame and a centrally placed rear 13Mp camera with the dual-LED flash surrounding it.

Plus, the bad news: like the new Moto X, the Nexus 6 has no microSD card slot for expandable storage. That will immediately put the Nexus 6 off many people's shortlist.

Around the front, you'll notice the stereo speakers - just like the Moto X - and a 6in screen, plus a front-facing 2Mp camera.The headphone jack is in the centre of the top edge, and the microUSB port mirrors it in the bottom edge.

The older Nexus 5 lacked the premium construction, having to make do with a plastic frame and build in order to hit that low price. It had an 8Mp rear camera, and a 1.3Mp front camera.

As with the Nexus 6, it put many buyers off due to the lack of expandable storage.

In terms of size and weight, here are the vital stats:

Nexus 6: 159.2 x 82.3 x 10mm, 184g

Nexus 5: 137.9 x 69.2 x 8.6mm, 130g

Nexus 5 vs Nexus 6 comparison

That makes the Nexus 6 a much bigger device, and not necessarily a natural upgrade for Nexus fans. To put it in context, here are a couple of other key rivals to the Nexus 6:

iPhone 6 Plus: 158.1 x 77.8 x 7.1mm, 172g

Galaxy Note 4: 153.5 x 78.6 x 8.5 mm, 176g

However, because of the tapered edges, the Nexus 6 will feel a lot thinner than its 10mm thickest point, and no-one will be able to tell the difference between the three phablets in terms of weight.

Nexus 5 vs Nexus 6 comparison

Nexus 5 vs Nexus 6 comparison: screen

With a 6in screen (or 5.96in if you want to be pedantic), the monstrous Nexus 6 needs a monstrous resolution, and Motorola doesn't disappoint: it has the same QuadHD dimensions as its rivals at 2560x1440 pixels. So that's the same as the Note 4 and LG G3.

The Nexus 5 has a 5in screen (4.95 for pedants), and a full HD 1920x1080 resolution.

What's changed is the screen technology. While the Nexus 5 has an IPS panel, the 6 switches to AMOLED, just like the Moto X (there's a definite theme here).

We've yet to clap eyes on the Nexus 6 of course, but we've been using the Moto X for a week now, and it has one of the best displays of any smartphone this year. Some might dislike the too-vibrant colours, but AMOLED has plenty of benefits, especially when it comes to power saving as you need only light up the necessary pixels to show information.

Both smartphones have Gorilla Glass 3.

Nexus 5 vs Nexus 6 comparison: processor and hardware

Nexus 5 vs Nexus 6 comparison

Motorola / Google has chosen the stunning Qualcomm Snapdragon 805 (with Adreno 420 graphics).

This is a big upgrade from the Nexus 5's Snapdragon 800 (which was a great CPU at the time), and its built-in Adreno 330 graphics chip.

The quad-core 805 processor improves hugely on memory bandwidth, being 100 percent better than the Snapdragon 800. It's also a 64-bit chip. When you factor in the Nexus 6's 50 percent extra memory (3GB vs 2GB), the Nexus 6 should be a storming performer.

Google Nexus 5

Storage-wise, the Nexus 6 will be offered with either 32 or 64GB, doubling on the choices for the Nexus 5. That's good, but it will still be limiting for some people.

One of the Nexus 6's new features is 'turbo charging'. Connect a suitable charger for 15 minutes, and Google says you'll get six hours' use from the Nexus 6. The 3220mAh battery is also a lot bigger (the same as the Note 4) than the 2300mAh cell you'll find in a Nexus 5 (and also the new Moto X).

Of course, it has a bigger screen to contend with, but the other components should be more power efficient. We'll test battery life as soon as we can.

(On a side note, don't forget you can upgrade a Nexus 5 to Android 5.0 Lollipop, and Google claims this will bring roughly 30 percent better battery life)

Nexus 5 vs Nexus 6 comparison

Nexus 5 vs Nexus 6 comparison: cameras

Although the new Moto X also has a 13Mp camera, the Nexus 6's is better as it has optical image stabilisation which is disappointingly missing from Motorola's own smartphone.

The Nexus 5's 8Mp camera also benefitted from OIS, but we're fully expecting the Nexus 6 to take much better photos and videos. If video is you thing, you might be happy to see support for 4K recording on the Nexus 6.

Nexus 5 vs Nexus 6 comparison: which is better?

At this early stage, it's impossible to come to any conclusions, not least because there's no official price for the UK version of the Nexus 6.

Size is also a big factor, since not everyone wants a phablet. A 5in screen is the biggest some people want or need, and the change to a phablet could be the deal-breaker for some.

Motorola has done a brilliant job in making the Nexus 6 as small and light as possible, and going by the surprising demand for the iPhone 6 Plus, people might be more receptive to a Google phablet then we think.

Only time will tell. For now, if you were playing Trump cards, the Nexus 6 beats the Nexus 5 in every area: battery life, 2D and 3D performance, screen size and resolution, cameras. Whether or not the purported $649 SIM-free price translates to a similar price in pounds remains to be seen, but it's one area where the Nexus 5 will win.