Anyone feel like a completely different experience having a second child?

I have a 4 year old non verbal son on the spectrum and we have a 10 month old daughter as well. Does anyone ever feel weird about second children? I'm not sure if weird is the right word to describe what I'm feeling but it's so awesome and hard on me at the same time. I get this insane gratification hearing my daughter talk little words as I very very rarely ever hear my son talk. Anyone with non verbal children know the struggle, but I almost feel bad celebrating these things with my daughter so much because we've never experienced them before. I'm not making any sense because the feeling is very hard to get across, just wondering if anyone else has ever had a similar situation and can relate!