There is a clear distinction between sentient and non-sentient though. What the game currently does not capture is the question whether an alien species would be discovered and recognized as "alive" at all. If we were to discover an alien fungoid or plantoid species would we even recognize it as a lifeform? Or more extreme, if we were to find energy based or silicate based life, would we recognize it as such? This is question that would have to be answered before we can even start to make a distiction between sentient and non-sentient. I think there are numerous factors that would have to be considered. The perception of time is for example one of these, if it takes 100 years for a species to say "hello" meaningful communication would be quite impossible, making a distinction between "something" and "someone" not an issue in the first place.
So xenophile and xenophobe in this sense would be more a question between the "will to explore and find other forms of life" and "fear of the unknown" (making also either of the two meaningful starting ethoses).