This is the 535th most frequent Japanese word.
変わっ
The Japanese word "変わっ" (kawatt) is the stem of the verb 変わる (kawaru), which means "to change" or "to be different."
In this sentence, '変わった' is used to describe a change that occurred, referring to a shift in the person's attitude.
彼は急に態度が変わった。
He suddenly changed his attitude.
In this case, '変わろうとしている' conveys an ongoing or imminent transformation of the world.
世界が大きく変わろうとしている。
The world is about to undergo a massive change.
Here, '変わっています' indicates a unique or distinctive quality about the design, showing it differs from the norm.