Considering both Delita and Ramza had beloved sisters, and the Death Corps tried to kidnap them both, it's tempting to think that Ramza's and Delita's roles would have been reversed had Teta lived and Alma died. Of course, Algus and Zalbag would have acted differently at Fort Zeakden.

I don't think Ramza had the same issues as Delita, so most likely not. Ramza's the sort of person who does what he thinks is right, no matter how inconvient it is. Delita's more the kind of person who plays along while carrying out his own agenda on the sly.

I think the only way Ramza would cooperate with Dycedarg is if Alma's safety depended directly on it.