From a cost standpoint, the portable system seems more attractive. What are the downsides to a portable system?
A (scientist): You have to wear a portable system. While they aren’t very heavy, they may bother you – at least for a while. Also, the microphone with a portable systems plugs into the fanny-pack amplifier/speaker combo. Thus, it is more obvious you are using amplification. A (teacher): You have to remember to re-charge the system every night, because the charge only lasts ten hours or so.
