While the iPhone 6 and the iPhone 6L are likely to be broadly similar there may be more separating them than just screen size.
Already rumours point to some significant differences and it makes sense too that Apple would try and differentiate the two handsets as much as possible. So while nothing is known for sure these are the main things that we expect to be different between the two phones, based on rumours and analysis.
This is the obvious bit, the iPhone 6L's USP is that it's bigger than the iPhone 6, which of course means the screen is bigger.
At this point almost every rumour reports that the iPhone 6 will have a 4.7-inch display, while the iPhone 6L will have a 5.5-inch one, so we're almost certain this will be the case.
While there's a chance that the two phones will sport different resolutions (to keep the sharpness of pixel density) we expect they'll be the same as that should ensure that it's easier to get applications up and running on both.
On the flip side it would mean that the iPhone 6L has a lower pixel density than the iPhone 6, but if the resolution is high enough then that won't much matter.
Current resolution rumours veer from 1704 x 960 to 2560 x 1600 and while we're sceptical that it will be quite as high as the latter of those even the former would mean that both the iPhone 6 and the iPhone 6L would have higher pixel densities than the iPhone 5S.
We expect that the iPhone 6 and 6L will look very similar, with the new curved design that we've seen in so many leaks, but they may not be identical.
The main difference that we might see is a slimmer iPhone 6L. Both handsets are tipped to be thin, but while rumours point to a 7.0mm thick iPhone 6 there's talk of the iPhone 6L being just 6.7mm thick. That's a negligible difference really, but it should just about be noticeable.
It makes sense too, after all the iPhone 6L has a larger footprint overall for obvious reasons but we're not expecting it to be much if any more powerful than the iPhone 6.
As such there should be more space inside for components and Apple could potentially spread them out across the length of the device and thereby make it slimmer.
Having said that the iPhone 6L probably won't be much more powerful than the iPhone 6, there are rumours that there might be some differences in the grunt on offer as Apple tries to make distinct use cases for both.
But we're a little sceptical of that. While it makes sense that Apple would want to differentiate the iPhone 6L from the main iPhone 6 making it more powerful could lead the normal iPhone 6 to be seen as an inferior device, which wouldn't be a good way to position it given that we imagine many buyers will gravitate towards the smaller screen size and not want to feel penalised for doing so.
So there might be differences in power, but we're going to say it's unlikely.
The iPhone 6L will almost certainly have a bigger battery than the iPhone 6, that's just common sense given that it's a bigger device and therefore both has room for a bigger battery and could probably use one since its larger screen will eat up more power.
If more evidence were needed just look at existing Apple devices. The iPad Air has a bigger battery than the iPad Mini 2 which has a bigger battery than the iPhone 5S, so there's no reason to think things would be any different here.
Aside from it making all kinds of sense that the iPhone 6L would have a bigger power pack there's also some evidence for it, as IT168 reports that the iPhone 6 will have an 1800 mAh juice pack and the iPhone 6L will have a 2500 mAh offering.
This is another obvious difference. We don't know exactly how much either handset will cost yet, but even if the iPhone 6L were identical to the iPhone 6 in all ways other than screen size it would still make sense for it to cost more and given that there might be other differences besides it makes even more sense.
Obviously the prices haven't been confirmed, but there are rumoured Chinese prices for both handsets, which equate to a starting cost of £500/$858/AU$915 for the 4.7-inch iPhone 6 and £563/$966/AU$1030 for the 5.5-inch iPhone 6L.
In both cases those won't account for local taxes, so expect the final price to be a little higher, but either way it's clear, as you'd expect, that the iPhone 6L is likely to be the more expensive of the two.
Having 128GB of storage would be great - 64GB has been the cap for a while on iPhones - but the iPad has a 128GB option and given that there's no microSD card slot it could certainly come in handy.
But it seems a little strange that only the iPhone 6L would get the option since we can't imagine there's anything stopping the iPhone 6 getting that much too. Sure there might not be much space in the phone's innards for the extra storage, but then it shouldn't take up much more physical space either, so that shouldn't be a problem.
On the other hand it could be a case of Apple wanting to further differentiate the iPhone 6L. We dismissed that when it came to extra power but extra storage is less likely to leave iPhone 6 users feeling neglected and with the bigger screen the iPhone 6L could be positioned more as a media device, for which the extra storage would certainly help to store videos, games and music.
While there are any number of rumours doing the rounds the only truly major difference that we expect to see between the iPhone 6 and the iPhone 6L is the screen size. That's also the one thing that will almost certainly be different if Apple does launch two handsets.
Other than that we'd expect the 6L will be a little slimmer and a little more expensive for the reasons outlined above, while the rumoured power differences are unlikely and storage could go either way.