teen shauna vs adult shauna

After Season 3, I’m finding it harder to see the similarities between adult Shauna and teen Shauna. Don’t get me wrong—they’re both great actresses—but I feel like they’re written and portrayed differently now. When I look at young Shauna, I can’t help but think she wouldn’t grow up to be the way she is as an adult anymore as I would see in Season 1. What do you guys think?