SMAA is infinitesimally better than FXAA, its a poor man's AA, but it's better than nothing especially considering low perf hit
temporal SMAA, ie SMAA T2X is much better, or at least I thought so
because SMAA T2X in Crysis 3 was wonderful, but in Watch Dogs and Alien Isolation it seems barely adequate
nature is easy to AA (Skyrim, Ethan Carter) because its round shaped,
but human-made objects, towns, buildings, roads etc are challenging to AA properly because of long straight vertical and horizontal lines that just love to pixel-crawl
I prefer MSAA in older games because I usually have enough GPU power to force supersampling,
but for todays games I'd take something like SMAA T2X if I had to choose
But pure SMAA is meh and laziness. I can do better than that myself with tweaked and injected FXAA/SMAA
(although there is UI/font problem with injected/driver version)