Go ahead and google the terms 'GPU hierarchy'. You'll get a link to TomsGuide as the first match that's VERY helpful, as well as a sense of where each card lies in the spectrum, and it's graded from 1-100. That was helpful in making my decision recently. I got the Lenovo Y540-17IRH because I trust the brand. It has an Nvidia GeForce 1660Ti, so it's mediocre for gaming at this stage, but I'm a mediocre gamer 😛
Good luck!