My baby sons could not be more different developmentally. Anyone else with totally different kids?

[Janieskids]

ds1 sat at 5.5 months, crawled at 7 months and walked at 10 months. Babbled at 6 months and said his first word at 10 months. He is very loud and always has been
ds2 is 11 months and sits, but doesn't crawl, cruise or walk. He started babbling a week ago and we are nowhere near anything like a real word. He is a very quiet little boy.
I find it hard to believe (although it's true!) that they have the same Mum and Dad. Anyone else have kids that are just so different from each other?

I have a dd and a ds and they are polar opposite of each other. Dd was talking at 11 months and ds was very slow to speak. Dd was slower physicaly. ds is a better climber etc and he is 3 years yonger than her. He showed her how to open the child locks on the cupboard doors

Stops me from being bored.

My two Dd's are very different and in dd2's first year i was constantly worrying that she wasn't developing normally because she was behind compared to Dd1. I had to realise that she was her own person and would do it when she was ready.

They are still very different now and always will be iu guess.