I went for Upper GI endoscopy in 2018 and there I saw that the endoscope's head was of black color and recently I went for endoscopy and saw that the head of endoscope in which camera is attached is of silver-grey color and the head was quite hard to touch and not flexible. Are both these endoscopes different from one another? If yes, then can the endoscope with silver-grey head prove to be more lethal for endoscopic procedures as it's head is harder than the other one whose head is black as it can cause perforation etc. Also see images attached.