here is a good comparison except he forgot that the gen 5 has interchangeable backstrap youtube.com/watch?v=qMS5AGNrR6Y

Hi Damon and welcome. In the broad strokes, the Gen 5 guns are going to be "better" in many regards if you were weighing a Glock Gen 3 vs Gen 5 pistol. The barrels are better on the Gen 5 guns, the trigger is better, you can get a MOS model, swappable backstraps are cool, and some people find the finger grooves annoying. Best rundown of details here : https://aliengearholsters.com/blog/glock-generations/#:~:text=In%20the%20broad%20strokes%2C%20the,find%20the%20finger%20grooves%20annoying.