I try so hard to treat mine the same but they have such different personalities that, thinking about it, I'm not sure I do. One of them is much more of a people person and quite charming and probably gets away with more. This is me talking v frankly by the way - they both have clear boundaries and A LOT of love and it's possibly not noticeable to them. But im worried it maybe is. I can't really explain it but I guess maybe personalities mean that something may be out of character for one which I would question whereas not for the other IYSWIM.
I'm not talking in terms of male/female safety differences by the way. More of a non specific way...