Are there any technical/logical differences between the comparison "!= true" and "== false" in programming languages, and if there are, which comparison should be chosen on what occasion?
Logically there can be differences depending on the type of value that you are comparing and language you are using. For example:
x == false implies x != true, but x != true does not always imply x == false because x can also be some nonsense value.
1 + 1 = 3 is both == false and != true.
7 > cat is neither == false and != true since it is nonsense.
x = null is != true but is not == false.
来源：https://stackoverflow.com/questions/41682691/difference-between-true-and-false