My First Egg!! Leghorn or Silkie?

[CTblitzen]

So went out to my coop today after hearing suspicious sounds. Popped open the back door to find an egg in the nesting box!! We are at 24 weeks and someone finally decided to lay I am wondering though, is this a silkie or a white leghorn egg?

It’s the smaller one to the right, being compared to a store bought egg. Any help appreciated

 

[MrFluffyandGirls]

Leghorn

 

[aart]

This might tell the tale...
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
....or you may have to stalk the nests to 'catch her in the act'.