Anxeity and Excitement feel the same, but how we interpret and label them can determine how we experience them.
Excitement is decribed as an energized state of entusiasm leading up to or during an enjoyable activity, it doesn't always feel great.
Brene Brown Atlas of the Heart p. 12
We can get the same "coming out of our skin" feeling that we experience when we're feeling anxious. Similar sensations are labeled "anxiety" when we perceive them negatively and "excitement" when we perceive them positively.