As everyone's saying, there is no difference to the child. However, unfortunately there is a difference to how society is set up to treat them. If your son will become a white man then he will be born with a huge amount of advantage already. I want my boy to be a feminist, and anti-racist, aware of the advantages he's had through the accident of his birth, and whilst being self assured, be confident enough to be an ally to those less fortunate. I'm trying to raise him in this way, full of love and confidence in who he is but also conscious and critically aware of how society may advantage or limit him and others. It's a journey I'm on and I don't have all the answers but it's important to me to try.
One small thing - in my experience, the default in books is male. Example, Dear Zoo is full of animals but every single one is a "he". This is the same in most books, and also tv, eg The Gruffalo. I found that my own internalised patriarchy also meant I used "he" as the default in everyday life, eg "look at that squirrel over there, isn't he nice?" Instead I try to use "she" 50% of the time. In the Dear Zoo book and others I actually wrote "she" in the text on some of the pages, to remind me to read it that way. This may sound militant to some but if we just perpetuate the patriarchy nothing will ever change and our sons will grow up to absorb the status quo instead of being critical and questioning of it. Similarly I expose my son to as much diversity as possible, where we live and through choice of books and characters etc, to try and ensure "white" isn't the default. Not always easy.
Obviously the most influence at first will be what he sees at home and that's hard, as I do most of the housework whilst DH works longer hours, but we are conscious that it's important our son sees DH sharing household chores like cooking, cleaning etc, and also sees his mum being a different role from only mum and working in my career during his childhood.
Anyway that's just my tuppence worth and it's all a learning curve.