Just giving my two cents on the Nobel Prize - which I upvoted for a long time - discussion:
Using Atilla to take over cities takes so that you need lesser votes? Well, if you are playing Atilla, you might take CSs/Civs early in the game and end up with some cities and some major unhappiness. Also, if you pretend to go on a Diplo win as Atilla, you will have a tough time gaining alliances against a Swedish player. Nobel Prize is much better at gaining alliances, and you don't have to sacrifice your scientists or engineers if you don't want, as you don't have to marry every CS as Austria nor you have to warry during golden ages as Persia. The good part is the versatility it provides: having a tough war? Then save this GG and try gifting the next one. You can always look for peace if you want to end the war and gain a CS instead of keeping warring.
Sweden against a marry-like Austria? First, some things: Austria doesn't have a bonus that grants them free-CS-alliances, for it to work they have to be allied. It will be harder for Austria to ally a CS that is allied with Sweden because they can instantly gain 90 influence! You can always take over Austria as well, with help of their near CSs. Nobel Prize is, for me, a top UA, and it is really good for what it aims for: hold that CSs so that Austria can't eat it. One more thing: if there is a bunch of guys like Atilla or Maria Theresa taking over/marrying the CSs, good for you! They will still need as many votes as you, and with Nobel Prize, you basically grant them. The less CSs needed to ally (if you aim a Diplo) the better, so you can use the GPs you don't need aswell.
(BTW, not in the subject, I started a new game as Persia and wow. Seriously, wow. My money is on them - now that NP is eliminated)