The expression far cry means "very different from." If you live in a tiny cottage and your next door neighbor has an enormous mansion, you could say that your house is a far cry from your neighbor's.
Something is a far cry when you're disappointed by its difference from something else. You might say, "This hotel is a far cry from the way it looked on the web site" if you're let down by your tiny, windowless room. The phrase within cry of has been used since the 1600's to mean "close enough to be heard," and far cry came along in the mid-1800's, meaning "too far away to be heard," or a figuratively long distance.