You can categorize the song however you like, but try to remember a song....... any song, consists of time signatures, rhythms,  flavor, montunas and many other components.  A musician can call it what he or she wants, also.  What's left is the person, performing to the song.   Other than the offbeat drum solo, most anyone would dance a bossa nova to this bossa song.  One could dance mambo or maybe even a syncopated swing, but the root is still bossa.   No samba, far too slow and too fast for rhumba.  The other song was never indicated, so I don't know why you'd even say "either".   The second one is nothing more than a novelty tune.  I've listened to all styles of music my whole life.  Played and arranged music for another almost 60.  Studied it in dance for about 32 years.