If you only had one saw and only cut firewood, you would have many warm winter nights just owning the 361.
That said...
I don't see where you are going to notice any difference in a firewood situation between a 290 and 361. It's a 56.5 cc saw vs a 59 cc saw; the only difference is a little bit of weight. One of those two saws is going to collect a lot of dust. If you aren't going to go any bigger than the 361, then just get your money back and buy a bunch of RSC chains.
I would buy one size bigger (actually, I did) so you can power through the occasional larger round with a 25" bar. I spent quite a bit of time at the dealership holding the 361 in one hand and the 441 in the other. Put em down, switched hands and repeated. I didn't notice much difference just holding them, but you definitely will in the cut. The 441 is smooth, powerful and runs longer on a tank of fuel than the 361. Type in '441' into the search box above, grab a brew and start reading; you'll be waiting for the door to open tomorrow to trade that 361 in on a 441.