I'm not sure we should mention songs from the same composer, as they are more or less doomed to sound the same or at least would share the signature style, and any composer can rehash their past ideas. I've been totally sick of how VGM snobs claim "this sounds the same as XXX, so this is crap", bashing Sakimoto and Sakuraba, for the sake of wanting to look smart and an elite, but this is just my two cents, not something everybody else should follow.
Anyway, classic example of being not the same, but similar.
http://www.youtube.com/watch?v=oFOIFPHbjN4
http://www.youtube.com/watch?v=lnGnJWKyBak