I use an endoscope camera as a do-it-yourselfer mainly to explore hard-to-reach corners. The main area of application is the search for leaks in our caravan or other pipes. For this purpose, I once bought an endoscope camera for 200 euros, which fully serves its purpose.
Now I was of course curious to test what a 5x as expensive endoscope camera can do and whether such a noble part is worth it for me as a hobby craftsman.
The professional part is clearly better in terms of image quality and manageability. Everything is better illuminated and more clearly visible. The professional part scores especially in color representation. The operation is very simple and you can control the camera well with the hose. The pictures on the display are clear and differentiated. You can record photos and videos on a memory card. However, my old endoscope camera also has this function.
What the professional part has exclusively is the wifi connectivity. You can transfer images to your smartphone using an app. This function is very handy when I want to show the pictures to an expert in a workshop, for example.
Workmanship and material quality are very good, and the sturdy and practical transport case is a plus.

Conclusion: The significantly higher price is reflected in better image quality and more functions. The normal home user won't really need that, however, and will therefore get by with a cheaper camera. However, if you use such an endoscope camera frequently and want to share the images with third parties, you will find a high-quality tool at a reasonable price.