I don't know the Sefardic types. But I am very familiar with different Ashkenazi types. There is more than one Jewish look. But there is a variety of Jewish looks.
Here is one type, for example:
![](http://www.sgipt.org/biogr/reik.jpg)
This is a famous psychoanalyst, Theodor Reik. This type is similar to Woody Allen's. It's virtually impossible to confuse him with any other ethnicity.