Yes, it's because it's a younger tree and because there is lots of variation in oak leaves. Look at the pictures on the site below and you will see leaves that look more like yours.
https://gobotany.newenglandwild.org/species/quercus/rubra/
You can trust me on this one. I generally don't get into oak leaf conversations, because of this very issue on how much variation there can be and how everyone gets to speculating about hybrids and all that junk. No one know about that unless a DNA test is done, and even then there may be doubt.
That is a northern red oak......best wishes......