It depends on the usage of your device. It's just a extra layer of protection and comes with some advantages over others (Like scratch resistance, splash proofing).
If your phone has a soft back cover and a glass protector on top of the screen then dropping it from a table or bed won't hurt that much but your phone will get some scratches on the body. Mild pressure like carrying your device inside your pocket or under the pillow or inside a bag won't affect. Corning Gorilla Glasses actually passed several drop tests, tension tests, scratch tests.
You can trust Gorilla Glass because they don't make glasses only for smartphones. They also make glasses for industries. Corning is the company who manufacture Gorilla Glass.
So, answer to your question is it's not significant at all. You must replace it with other unbranded screen protections. You must have to check the relaiabilty of that product before using it. And that's where brand recognition comes into place. Corning will provide you warranty on specific products. And because many users already used it so you can obviously trust them.
Choice will be yours. If you able to make the right purchase no matter it's branded or not it'll always worth.