especially

[navi t]

1-I want to tlke about these children, especially about Harry.
2-I want to talk about these children, and especially about Harry.

I think in 1 Harry is definitely one of 'these children', but in 2, he might be one of these children and he might be a child outside the group of children I am refering to as 'these children'.

Am I correct?

[Tdol]

I'd say that you are correct.