If someone can get meego working on the lumia I'd definitely consider it ... (an actual n9 is harder to come by, would prob be more expensive).
Should be ridiculously easy. It's more or less the same hardware and the Meego side is open-source.
No, Lumia has three capacitive windows buttons and physical camera button in addition to N9 hardware. N9 has buttonless interface.
In the end, they are pretty much the same phone with different OS.
Lumia seems to have a different CPU. Edit: Apparently it also has less ram.
I can't find the specs for the N9 CPU, but the Lumia is 7 grams heavier and 0.5 mm longer. It could house 7 more grams of battery and the shorter battery life could indicate a beefier CPU.
Or a less power efficient OS. I'll go for the second.
Lumia has 1400 MHz CPU while N9 seems to have 1 GHz.