I think you're comparing only the user experience and not the technology behind the two - all but the AMOLED screen mentions. And that was just a very wise decision on Nokia to include that.

MeeGo and Sailfish are both very efficient in how they handle applications, memory and it shows because both were on mediocre hardware for the time (mid-tier hardware if I were being more honest than snarky) and both did quite well in regards to their performance in perceived speed against their higher spec'd competition.

Between the two, I'd say that multi-tasking is better in Sailfish due to embedded actions on the apps, but similar enough to MeeGo to acknowledge the similarity. Swipe UI in Harmattan is improved in quite a few ways in Sailfish, but there's a few times when Sailfish is a bit cumbersome still. That alone would be the reason why I'd give the edge to Harmattan - I accidentally swipe an app into multi-tasking mode in Sailfish more than I did with Harmattan.

But in the end, think of it this way. MeeGo was only on one device, it never had to scale whereas Sailfish did get released on two devices and scaled from a phone to a tablet.

To me, the edge goes to Sailfish for that. At least they produced two devices - now, delivery of that second device to folks in the second/latter waves is another discussion.

That's my opinion in a thread about opinions...