How you present your argument is nearly as important as the argument itself, which is why it is imperative that your essay follows a logical structure.
It is important to show that you understand both (or all) core theories in great depth, both on a theoretical and applied level.
In essence, the wording of the essay question will tell you how the essay should be written.
You should also make sure that all the different parts of your essay fit together as a cohesive and logical whole, and that the transition from one argument to the next is fluid.
Students often treat essays as lists of arguments, presenting one after the other with little consideration for how they fit together, which inevitably leads to a lower grade.