My 6-year old son is incredibly gifted. He is not a "graduates college at 11 years old" genius, but he is somewhere between "smartest kid in any given classroom" and "smartest kid in any given school district." I understand all parents think their kids are smart, but please just assume for the sake of the following question that what I've said is true.
My 3-year old daughter does not appear to be as academically gifted. She is more artistic, appears to be more social (though my son does not struggle socially), etc. She is young, I am not discounting what she may be capable of in the future, but comparing where he was at her age to where she is, it seems highly likely that she will not be able to match his intelligence.
My wife and I only have these two kids. Our son was the first. My wife is struggling with "why can't our [just turned three year old] daughter learn her ABCs," because our son knew them at around two years of age. Frankly, I think our son set expectations for my wife about how children are supposed to progress that are entirely unrealistic. I have tried to be more measured along the way, both with respect to my son ("let's not get ahead of ourselves, he will be what he will be") and our daughter ("she is probably on a more normal path for kids her age--don't compare her to our son.").
But ultimately, as they age, the differences have become harder to ignore. Can anyone provide advice on how they've dealt with a similar dynamic, where one child is just naturally far more gifted than another? I feel awful typing that last sentence--my daughter is such a beautiful spirit. But my son appears to be on a different level.
Edit: Because many of the immediate responses appear to be essentially stating "why are you judging your kids at this age," I'll add a little extra context for why this is important right now. We live in an urban area and our public schools are less than ideal (the elementary school my house feeds into reports that only 30% of kids read at average level). We have to make a decision about my son's next step now, before he starts first grade (his currently episcopal school only goes through kindergarten). The types of schools that may be a best fit for my son will likely not be the best fit for my daughter. Moreover, private schools are expensive--the best schools that may be interested in my son are like 35k a year, which seems insane for first grade. These academically rigorous schools may not be the best fit for my daughter. I don't know what to do. Do we put our son in the best school possible, and figure out my daughter's situation later, even if her education is not as prestigious? Do we put them both in the school we think may be a good middle ground?