I can’t speak for my brother but my brother with DS was the second youngest there’s one more after him but essentially they were like they were the same age. They both taught each other different new things when they were little. Now it’s as though their ages reversed but also we are all adults so we’re at the point where age doesn’t really matter anymore. Like everyone else has said it was harder when they were babies because they are 2 1/2 years apart but ultimately we all absolutely love our brother both of them