[It's hard to argue against something true like that, so, well, Dimitri doesn't, instead just taking a sip of his tea so that he has an excuse.]

There was Eri's battle in Violet, but all of the gym leaders have their own differences. And the Elite Teams are quite different.

[Before he can go into those differences, however, Byleth brings up his romantic life, and Dimitri nearly chokes on his tea. Ignore the flush across his face.]

Oh - that - Professor, you.... [What does he even say to that?]