Mindcrime by a pretty wide margin. It's a classic that has held well up over the past 30 years.
SSoaSS has one stellar song (the title track), two solid songs (Moonchild and Madness) and five songs that are mostly forgettable.
AJFA is one of the worst mixed albums ever, so it already starts out with a negative. Blackened and Dyer's Eve are great songs. I liked a few of the others at the time, but they haven't aged well for me.
Side note: I love that I can just type "ssoass" and "ajfa" into Wikipedia and have the entries for these albums come up!