Ms and Mrs. are titles that are given to different kinds of women. In the US, Ms is a title used to honor women. Whether married or not, so far you are a woman, then you can be regarded as a Ms. Ms whether it possesses the period after ‘s’ or not is the same.
Therefore, Ms and Ms. are one and the same. While, on the other hand, Mrs. though is also title ascribed to women, it is only used for married women. The only exception is women who possess distinct titles such as Unless; a particular married woman possesses distinct titles such as Atty (attorney), Dr (doctor), etc.
she will still be regarded as a Mrs. In terms of pronunciation, Mrs. obviously disyllabic. However, there are some parts of Southern America that have a slang of the word that makes it sound similar to the pronunciation of Ms.