I don't worry about getting them exactly the same. Only one tail at a time can be seen. It has to look right from whatever viewpoint you have.
Often my lock panel opposite the lock is smaller in height that the lockside. It's the same length, but lower, as the top of the panel can just take in the lock bolt at the top. Make it suit your sideplate, or make your sideplate suit your panel, whatever your project call for. If you're making a bench copy, you're going to have to follow your model.
...by the way, if these are your first ones, they are pretty good!