Olympus handheld endoscope, which model is better?

Olympus handheld endoscopy models are especially many, such as IPLEX NX, IPLEX GX/GT, IPLEX TX, IPLEX G Lite and other models, the characteristics of each model are different, NX focus on 3D measurements, GX/GT versatility, TX small diameter bending function is excellent, G Lite compact, it's industrial endoscopes are very good