Variable. Myth, sci fi, and fantasy have a tendency to blur in this sub-genre, which can have a negative impact on the realness of science. But, there are other stories that use the echoes of myth to add depth and meaning, which has no real relation to science. This means that the science can be more realistic. Generally though, Mythological sci fi does not cross with Hard sci fi.

High. There are some profound thoughts going on when myths and sci fi merge. Myths are used to add commentary to situations. For example, retelling an ancient myth in a modern setting provides a feeling that myths express a truth that relates to us no matter the time and no matter what society has become. Drawing from myths shows that even as society changes and technology advances there is a piece of the old that remains within us.

High. Myths are full of legendary characters. Sci fi uses these characters as a basis for new characters, which makes them even more interesting. An immortal alien can be difficult for readers to relate to, but draw on the god Pan and now readers have a reference point and it also gives the character history and depth.

Moderate. Using myth in a story runs the risk of tried and true plots. However, with a bit of that sci fi sense of wonder and invention the plot likely won't be so predictable.

Variable. In the same way that some myths are violent and some are not, so too are the stories of this sub-genre.