Unless you routinely buy a new device annually, one additional issue to pay attention to is long-term support.

In the case of system software that means the lifetime of supported (or available) version(s) of Maemo vs Android.

Here Google has little track record being relatively new to the market, but at least their motive is thee availability of Google services so one could expect them at least not to hinder the porting of new versions of Android to past devices. There's also quite a bit of action on the alternative/modified firmware scene.

Moto wants to sell devices, plain and simple, but the Android porting scene and activity applies here as well.

Nokia, well, being in control of both the hardware (support lifetime) and system software (support lifetime via compatibility) leave the customer pretty much at their mercy. Oh, and Nokia simply wants to sell new devices and based on Maemo's track record once a new hardware platform is introduced, the previous models cease to be supported and the alternative scene unfortunately isn't there to maintain let alone improve the user experience.

Then for a long-term user there are other considerations, such as cost and availability of repairs and spare parts. E.g. if a certain model is widely and officially available in your region, the chances are that it can be repaired easier than less common alternatives...

It's all down to your personal priorities.

Personally I find long-term software platform support/availability much more valuable than most unessential physical hardware variations between same generation devices.