Tango and Jazz play together all the time, until Tango gets tired then he gets up on my lap or goes to his crate.....and Jazz knows when Tango's in his crate to leave him alone lol! They share all the toys, though Tango has a tendency to steal whatever Jazz is playing with. They each have their own chewies though...flossies and bully sticks etc. And they eat separately, because they both have a tendency to go back and forth between each others bowls. I feed each of them slightly different amounts so when they switch like that, I can't monitor their intake. Tango has one toy...well, it's actually just part of a toy...a little latex piece from a larger triangle and he detached that one piece from the rest. For some strange reason, he guards that piece with his life. He will NOT let Jazz have it, and gets really growly if she tries to take it from him. I decided to let him claim that as his own, but I only give it to him now when Jazz isn't around to bug him about it. I figure that's the one privilege he can have for being First Dog.
I play with both of them together, and also separately. I make sure there's a little bit of 1 on 1 time for each of them. And when I'm training, one is crated while I'm working with the other one, so that's a little more exclusive time for each of them. Tango sometimes will "guard" me....try and get between Jazz and me when Jazz wants to approach me. This is a HUGE no-no, and I've been very strict with him when he does this. It seldom happens anymore, but it's not trained completely out of him yet.
The biggest piece of advice I can give you is to not expect your second chi to be a carbon copy of your first. It's silly when I think of it now, but I remember when I first rescued Jazz, I couldn't get over how DIFFERENT she was to Tango. She's more outgoing, more energetic (and I thought Tango was way hyper when I rescued him lol) less focused/shorter attention span, harder to train, and wants more of my time. She's a different body type too...Tango has a very cobby body, whereas Jazz is longer and leaner, Jazz's ears are WAY bigger than Tango's, her tail's shorter, and her fur feels different, even though they're both SC's. She's just different, and that really took me by surprise at first. Things that worked with Tango (training mostly) don't work with Jazz.
I didn't realize it until I rescued Jazz, but Tango was VERY easy by comparison. Kind of like my kids. When my first was born, he was a very easy baby, an angel. But I had no comparison, so I figured that was normal. Then I had my second, and OH BOY!!!! WHAT a difference! I thought I had a devil-baby lol! No, I didn't, I had a normal baby, it's just that my first was exceptionally easy.
I also prefer having one chi of each sex. I like that difference too. Some folks prefer the same sex, because it makes purchasing easier if you want to dress your dogs, for example. You can mix and match everything and don't need different colors for the different sexes, the way I do with mine....Tango has everything blue, black or red, whereas Jazz's stuff is pretty much all pink and lavender lol!