This paper shows a comparison between two modular multilevel topologies that are very used nowadays in medium voltage applications such as FACTS. These two used topologies are on one hand the modular multilevel converter, which traditionally has been proposed for high voltage offshore connections; and on the other hand the cascaded H-bridge converter that has been used mainly in motor drives. Both topologies show a good behavior in those applications, but this paper aims to prove that these topologies can be used in FACTS applications, mainly STATCOM systems, with a very interesting results.