Curtly vs. Tersely

In a curt manner; tersely, almost rudely.

In a curt manner.

in a curt, abrupt and discourteous manner;

Example: ‘he told me curtly to get on with it’; ‘he talked short with everyone’; ‘he said shortly that he didn't like it’;

In a brief, concise, or to the point manner.

in a short and concise manner;

Example: ‘a particular bird, exactly and tersely described in the book of birds’;