1, name difference; UG is short for UGNX. The previous software was called Unigraphics(UG), and was later renamed NX by SiemensPLMSoftware. UG and NX have different names, but they refer to the same software product.
2. Differences in user interfaces; UG and NX are slightly different in user interface. NX's interface is more concise, intuitive and easy to use. It has been improved and optimized many times to provide a better user experience. The interface of UG may be relatively complex, which requires more learning and adaptation time.