Look Difference in ReadOnly Fields

In my dynamicForm I have 2 readOnly fields, but both look different.

In the image attached, "media_type" and "case_pick_mon" are to readOnly selectBoxes which look different.

Only difference is, "media_type" was made readOnly after form display and "case_pick_mon" was made readOnly before display.

Can I make them look similar without making any CSS changes to particular field ?

Attached Images

SC_ReadOnly_Issue.png (22.1 KB)