Let's see...hmm, the print is too hard and strong and grey way too gloomy, BUT for young girls, this dresses would fit better for Teenagers, so that way they're not too bad IMO.
Dressing alike, I NEVER was a fan of dressing children alike, no matter the ages and no matter if twins or not. What do I like for children is matching colors (diferent clothes/same color) or prints (a dress or a blouse with the same print as we saw on Elisabeth+Eleonore) or even styles (dress+dress/shorts+shorts). So I will always hate too see the AAA's dressing alike, even though they dress diferently from time to time, but it seems when it's informal they dress diferently and when it's formal they dress alike.
Letizia stopped dressing her girls the same when Leonor was 5 years old and Sofia 3 years old. But Amalia is turning 10 years old, way to old for her to be dressing the same. AND there's no way she would want to dress the same as her young sisters, what I see is that when Amalia wears something, Alexia and Ariane would want to dress the same as her, it always happens all the time, the youngest likes to follow the eldest.
Just a suggestion, they could also wear the same type that Elisabeth and Eleonore wear. Ex: Elisabeth with pants and blouse and Eleonore with a dress in the same print as the blouse. It is matchy but at the same time, diferent.