The two sentences are both a little awkward, but intelligible with almost identical meaning.
An English speaker might say instead: "Three soap dispensers have already been broken in the mens' restroom, while all three in the womens' restroom are still working."
1) Note that the apostrophe goes after the 's' for plural possesives, not before.
2) We do not use "first" like this in English, it's "all" or "none" - an English speaker would likely think: "OK, I guess the speaker installed them in a certain order, but it's weird that he mentions that and didn't tell me what the order was..."
3) "While" or "whereas" instead of "when": "when" in this use indicates a specific, definite point in the past, and "while" indicates a comparison. You want the latter.