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.