As it goes, I am a traditional Rper, growing up with the oldest forms of D&D and Fantasy lore. 

The first picture you have provided is a Neko. The second is both a Beastmen/Beastkin to myself. As an older fella and from a more traditional standpoint, Beastmen/Kin are the same thing, with the difference(s) being the word a particular person might use; or the particular custom universe a person might make in which Beastmen and Beastkin are different. As it goes, this Rp is designed and stated as being Witcher and Dark Fantasy inspired, which leads me to believe it is also more traditionally inspired by the older stuff, such as D&D.