UI testing and UX testing are two different types of testing. UI testing is focused on the user interface of a software application.
UX testing, on the other hand, is focused on the experience of using the software application.
UI testing is usually conducted first, to make sure that the user interface is functional. If the user interface is found to be flawed, UX testing will be conducted to assess how well the user interface meets the needs of the users.
Generally, UI testing is less time-consuming than UX testing, because it does not require users to actually use the software application. UX testing, on the other hand, is more time-consuming because it requires users to use the software application and provide feedback.
UI testing is generally less expensive than UX testing, because it does not require users to be enrolled in a study. UX testing, on the other hand, can be more expensive, because it requires users to be enrolled in a study and provide feedback.
Overall, UI testing is less comprehensive than UX testing, because it does not assess all aspects of the user experience. UX testing, on the other hand, assesses all aspects of the user experience.