What is the difference between Minicom and gammu-smsd?

My understanding of Minicom: Minicom is a text-based modem control program (allows you to communicate with modem via AT commands on a text-based terminal) using serial port communications. Therefore, you can configure a modem using Minicom and even have the modem send SMS messages: at+CMGS=954xxxxxxx > Hello World +CMGS: 8 My understanding of gammu-smsd: gammu-smsd is a program that periodically scans modem for received messages, stores them in defined storage (e.g. postgresql/mysql database) and also sends messages enqueued (stored in a queue) in this storage. So both programs can send SMS messages using a modem. Both need to be configured to listen to the /dev/ttyS0 (assuming the modem is attached to first serial port) and both use the AT command set and baud rates. So are both needed or can you just use gammu-smsd without having to use Minicom?