The twins look like the same as each other.
The twins are the same as each other.
The twins look the same as the other one .应该不可以的.
look like看起来象,后面跟名词性的词；look 也有看起来像的意思,但后面要跟形容词,比较以下两个句子：
That dog looks dangerous.
那只狗看起来很危险.
That looks like an interesting film.
那看来是部有趣的电影.