Steve, a very interesting and timely review and your treatment of both devices was very even handed I feel. I'm currently looking at both phones as a future proof investment for my mobile needs. As you say, to many it will come down to individual preference and familiarity of environment or even aesthetics.
For me the Nokia UI experience has a major impact on the decision I'm about to make, leaving behind the inconsistencies in the UI and the fact that moving from one Nokia phone to another isn't always the familiar environment it should be, the lack of joined up applications is the thing that frustrates me most.
The whole development approach of Android is inter-operability - applications are developed as modules, which any other app can use and interact, e.g. an app that needs a map display, simply talks to Google maps to provide it. Over time this should lead to a memory-efficient environment. This environment of apps being able to transfer information easily and seamlessly is something that constantly frustrates me on Symbian, the number of times I've had to write things down in order to move information from one app to the next is a constant frustration on my Symbian device.
An good example of this is Geocaching - on my Nokia I can't use Ovi maps at all, it has no easy ability to take in any of the standard forms of waypoint information, so for geocaching I use the excellent Trimble Geocache Navigator, a stand alone app that makes the process of finding caches really simple. It provides web access, maps and navigation in a single app, yet I already have app's to do that on the phone, which is wasteful oif resources. If I receive an email with a cache link in, the process of getting that information from email to navigation application is convoluted and frustrating.
On the Milestone I can simply click on a link, the geocaching application automatically opens it and starts navigating, using Google maps to provide map display. It's a level of joined-up-ness (!) that's sorely lacking from almost every other mobile platform.
Whilst I've come to appreciate Symbian's strengths, it's far from stable enough when used in anger and it's nothing at all like the experience of a modern PC, which is what many mobile data users need these days. It's been interesting to see the attitudes of colleagues who are long-term Nokia users change as they start to do more data-centric activity with the device, those that don't experience problems, usually don't do much beyond make calls and take the odd photo. Those, like me, who are using maps, push email, web browsing, playing music, streaming radio etc. run into more and more stability and memory issues as they push the device.
In essence it comes down to one simple thing for me - which expensive investment is likely to be most future proof and give me more features in the future, even if not available out of the box now?
Symbian may provide 'updates' but in my experience they rarely add anything significant (beyond stability) that wasn't there when the device was first released. I'm confident on the other hand that Android will add significant extra functionality and performance and be a much more future proof OS. It may be lacking in a few areas at present (e.g. Flash) but I'm confident that when it does arrive, the experience will be much better on Android than Symbian.
Symbian^3 may raise the bar here, but the chances of getting it on the N97 are almost nil - I'm not aware of Nokia ever releasing a whole new OS for an existing device. The Android handset manufacturers on the other hand have already demonstrated significant device updates already, with major OS version updates being rolled out on older devices.
For me that makes the decision as to who gets my �400.
I realise this won't go on for ever - we have to remember the handset manufacturers are in the business of selling hardware and updating old devices doesn't drive new sales. That said, as part of the bigger picture, all handset manufacturer's contribution to Waste Electrical landfill could do with some brakes put on it, such is their marketing success!
Andy.