My boys are about 4 years apart! I love having two boys. They play together great most of the time. They love each other so much. My oldest was gone for a week and you can tell his brother missed him! They’d never been away from each other that long. He also just started middle school and they both had a hard time with being I. Different schools. I love their bond!
When they fight it’s bad though. You have to decide when you want to get involved and when you want to just let them work it out.

I’m having another boy also , they are gonna be best of friends, the boys clothes come in handy if you still have your oldest baby clothes and it’s gonna be easy cause you have already been through it

Set aside the older boys clothes as he grows out and put them in a bin. They will come in handy.
Boys are so much fun!