I'm a casual developer too, not knowing much about colors. But I can see the difference. For "my browser" visual image, I can kind of see "vertical pillars" in

I'm a casual developer too, not knowing much about colors. But I can see the difference. For "my browser" visual image, I can kind of see "vertical pillars" in the middle which which reminds me of times where we had not many colors in our palette. Moreover, if looking at red and moving on horizontal axis - it is same red and after only some distance it starts to change. The correct color mixing for me looks better - the colors start to change instantly and more smoothly.