Nekos are somewhat Xenophobic, which varies between the indidivual Neko. They at the very least believe themselves the most superior race out of all of them in the RP setting.
Yamataians make up a large amount of groups, from various planets to some Neps to Spacers ect. They are biologically superior to their other cousins while being artificial like Neko, albeit not for all of their lives for the most part unless a Neko when to a Yam body for whatever reason.
Fact is, good lot of the empire differs. Nekos are xenophobic and it depends about the empire otherwise. The Warmaster worlds, for instance, are fairly anti-neko and are almost entirely Geshrin.
Thats the only one I can vouch for, though.