Is this a brahma or RIR egg?

[BantammChick]

So I have two brahmas and a rhode island red hen, and today I got this egg, I got two just like it yesterday. It is dark brown in color, and medium size. Is this more likely a buff brahma egg or rhode island red?

 

[Squawkers]

Maybe try this

https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/

 

[Squawkers]

As far as the egg itself, I have had a rode island red and a Brahma and that egg definitely looks more like my Rode Island Red’s eggs, but my Brahma laid the punniest eggs (disappointing for how big she was) and I don’t think my rir was the best specimen of the breed.

 

[Penpal]

My Brahma hen, from show winning stock, laid medium sized eggs. My RIR always laid large, Xlarge, or jumbo. However, if the hen just started laying she may start out laying smaller eggs, then they will get bigger.