what difference between Conservative, reform and recontructionist and Orthodox Jew.prayers seem to be the same

Answer 1

Not true. The prayers are very different.
These are the differences:
Orthodox Jews adhere to Biblical law strictly.
Conservative Jews pick and choose the laws they like to follow.
Reform Jews believe Judaism is a cultural affiliation, and they do not observe any of the laws.
Reconstructionist Jews want to reinvent Judaism in order to suit their needs.

Answer 2

The difference is how strictly they observe Judaism. Orthodox Jews follow all the religious laws, Reform Judaism is very liberal, Conservative Judaism is in between.