Beside all the other answers, I suspect that the coloration in the second foto is not "natural" in the sense that at least the white balance was set to something else than white daylight, and possibly also the red channel up slightly in post.
It is not impossible to see a sunset of this color in reality, but it is rare to have this red intensity across the whole sky. I suspect that if you want this color naturally, you have to go somewhere closer to the equator than where most of us live. Also, if you are using some kind of automatic white balance, it won't do well on sunset scenes - see how above the clouds, your sky looks greenish. I have never perceived such an effect when observing a sunset with my eyes - when I'm outside, it seems that the parts of the sky which aren't colored red are still a standard sky blue. This mixture of red-orange with blue that produces a greenish shade either doesn't exist, or gets filtered by my perception.
So play with the colors, and see if you won't enjoy it more.
I'm not sure if you are also asking about that part, but I would argue that the second picture also has a better composition. The larger sun is more visually impressive. It is not overshadowed by a massive cloud like in the first picture. And the sky in the second picture, while reddish everywhere, has a subtle texture of layered clouds - the first picture has a narrow horizontal band of texture at roughly sun height, but is quite flat above and below it. The underexposed mountains that got mentioned in another post also don't have visual variety. So there is much less to keep your attention. That's not to say that you can never have a photograph that is full of flat space, but these only work when done on purpose, and need some planning to pull off.