Yes. *Their* present means more to both slayers than the other's, which is as it should be if even one were to start feeling responsible for the entire multiverse they really would have a God complex :)

I think the thing is I like Buffy best. So while I'm not going to deny she appreciates the applause ( cf The Prom) I still don't see that as her primary motivation. I still think that if she were offered a Chain-like mission where she'd be risking her life and someone else would get all the credit she'd take it in a heartbeat. She also does seem to have some inkling that she's not always going to be all that with the whole one day handing squad leadership over to Satsu thing. But you're right there's a definite source of (dramatic) tension there.