Differences...

Before having a boy and girl, I knew things would be different...duh, one is a girl and one is a boy. I just didn't realize HOW different until now.
When Jojo started kindergarten, we had just moved into the school district, just moved into our house, and just registered her 2 weeks before school started. She's always been an easy-peasy kind of kid. She goes wherever and does just fine with change. She was eager to start school, excited about taking the bus (Grandma was her bus driver), and was not the least bit hesitant about being away from me.
Now that Jakey is starting school, things are just a bit different. He's always been my clingy one, but he's over the moon about starting school, can't wait to ride the bus with his friends, and seems to not have any qualms about being away from me.
BUT...I've had WAY more conversations with him about what NOT to do at school than I ever did with Jojo. I didn't have to remind Jojo not to say certain words at school. It's not bad words, just words that make me cringe, ie. shut up, loser, retarded, etc. I knew Jojo would be polite and raise her hand without shouting out an answer. I've actually practiced this with Jakey. Today at dinner I was telling him he needed to politely ask the teacher when he had to use the bathroom and to not yell out "I have to poop!" (Meanwhile Jojo is covering her ears saying "MOM, I'm still eating." lol) Lately Jakey has taken to singing while he's in the bathroom and making funny noise (on purpose), so I had to remind him not to make those noises since they have a bathroom in the kindergarten classes. I know kindergarten teachers have dealt with all kinds of kids and Jakey is probably no different than most. But he's my baby and I'm all melancholy thinking about him going to school and a bit worried that things will continue to be WAY different with him in school.
Have many of you seen complete differences in your children (school aged or not)? If you have kids of the same sex, is their a lot of differences there as well?