"Looks different and it's interesting" usually isnt the kind of thing I hear described as race play, thats just having 'a type' or fetishization. Race play refers to kink dynamics where themes around race are the basis of the sexual interaction, or a component, often involving power dynamics around race

I'm speaking mostly as someone who's part of the kink community and for whom kink/bdsm play a role in identity, so I may have a more narrow interpretation of it than some, but if you look up the definition I think you'll find it generally refers to something more specific than just finding people who are aesthetically different from you to be attractive

(Sorry for not replying for 2 weeks then just dropping back in, this is my alt so I'm not on here as often)