What's the difference between getting better and getting better?

There is no difference between getting better and getting better. Both mean getting better every time. More and more is written language, and more and more is spoken language. In terms of strength, it is getting stronger and stronger.

For example, the road ahead is steeper and steeper, while the surrounding scenery is more beautiful.

More and more explanations:

More and more means: Numbers are accumulating, more and more.

Yue: overlap, the same as "Yue … Yue …".

Quote Childhood: When you lie on your back and watch the stars light one by one, the sky is developing in a deeper and higher direction endlessly, and there are more and more stars in the sky. Everything becomes darker and quieter, sharp invisible strings are tightened everywhere, every sound, even if birds are singing in their dreams and hedgehogs are running in the grass.