Credit: Instagram

It’s only been three weeks since Kailyn Lowry gave birth to her second son Lincoln, but the Teen Mom 2 star is already seeing major differences between him and her older son Isaac, 3. That should keep things interesting for her and Javi Marroquin!

“Everything from my pregnancies to now has been 110% different w/ Lincoln & Isaac,” Kailyn tweeted. “Complete opposites but hope they grow up as best friends.” We hope so, too.

As Linc gets older, Kailyn will likely see more differences — but also she’ll get to see more similarities between her two boys. Plus, the lucky newborn has big bro Isaac to look out for him through the years. And they’ve got a built-in buddy for family trips. Some differences in personality are also good! When siblings are too much alike, they tend to butt heads.

But, boy, that’s a lot of testosterone in one household. We’re betting Javi is excited to have boys for some quality man time — just as long as they don’t leave out Kailyn too much!

Do you think these new brothers will be close as they get older? Let us know in the comments.