It's been a year and half (exactly today!) since I left Finland, and a year and 5 months since I moved to Sweden so I think I can summarize a bit the topic.
After 12 months in Finland, Sweden appears to be second Poland in the world... Immigrants call it a land of paradox, where really everything can happen. One big mess, I'd say...
For example... the way Migration Office and Tax Office work. New rules for EU-citizens were provided with the end of April last year. One can move here freely and stay up to 3 months (turist/job searching). To get a job usually personal number necessary. This you can get by applying in the Tax Office. Alright, if you only have a place to live, then the number will be given to you. And then, you're told to contact Migration Office to register your stay. What they forget to mention is that only people with a job and studies with their families can be simply registered. Those ones, who wanna base their stay on a relationship with a Swedish citizen have it much more difficult! (noticeable it is that if you for example have a German boyfriend/girlfriend, and he/she has a job in Sweden and is registered, then you can just register as their partner without problems, problems start, when your partner is a native Swede!) Then you need to apply for a stay permit, fill all the papers where they ask really stupid questions, and then wait almost in eternity for their reply... I haven't got mine yet (my old stay permit expired, and I needed to get a new one, but I don't have a job and for school I'm waiting - applied and just need their answer coming latest next week - I just have a Swedish boyfriend I'm living with), though I applied for over a month ago.
Nevertheless, you actually don't need a stay permit/registration at all! You can open a bank account without it, and exchange a driving licence (it is more difficult to get a Swedish ID after 1.01.2007), and you can even visit a doctor - based on your personal number, which for Swedes is one of the most important things in the world, if not the most important (ok, different from Poland

). Why to apply for a stay permit then? Nobody knows...
Speaking of doctors... Theoretically after getting your personal number, you get as well a paper to fill and send to Swedish KELA

If you don't send it... nobody knows what it changes, as having a personal number is the only thing required to get a state help... But to "register" you need a copy of registration form from Migration board or a stay permit...
If you try to get some information somewhere, you won't get it, unless you're fluent in Swedish. If you're not, they'll send you to their websites for information - where info is hidden and written in such a strange way that even Swedish native-speakers have problems with getting a point of... On the main site an information and then if you get deeper in links, you see, the one on the main site is no longer valid! And this on the sites of authorities like Migration board for example.
Swedes seem to be very open after 12 months in Finnish woods of the archipelago. But that's just an impression. "Friends" who say they'll help you with something, never do it. Why? The answer is the same as in migration board question, nobody knows. They'll tell you anything you wanna hear, but rather away from the truth...
Those Fins who I met were the most honest people in the world!
People here (in Sweden) are trying to find a hundred ways of avoiding taxes... which is the most similar Swedish feature to Poles, my countrymen. They'll even hire a cleaning lady and say that it is just a little neighbour help, even if it comes up to 20h a week (which is 1/2 of the full work week)... Everything but not pay...
Sometimes I have an impression I'm not in the North Europe anymore, have nothing in common with Scandinavia. Well... not being able to make many friends - that was Sweden have in common with Finland

Though... my number of real Finnish friends, who's been in touch since I left: 5
Number of Swedish friends after longer period: my boyfriend only.
Nice comparison it is...
And one more thing which I loved about Finland - the originality. The clothes, and the fact how little people care about how they really look and what's considered more is what interesting you can say, not how you look - Sweden seems to be... just exactly other way around.
Well... I'd move probably back to Finland if not my boyfriend here. And the language - I'm already fluent in Swedish (though it happens that I'm asked if I come from Finland, still speaking with a Finnish accent sometimes

), and of course, I am going to learn Finnish as well, but... as long as I am in Sweden, Finnish is for fun. And it is easier to learn then
Greetings to everybody who I met and those you I didn't as well
This thing is posted because of my second short visit in Finland since I left. Stay heavy!