Very Similar, 咋舌 is from "瞠目咋舌"， Describe a facial expression when feel shocked. More used in passivity sentence. Exp: sth+令人咋舌 惊呆，is description of a condition that a person is too surprised or shocked to move or talk. More used in active sentence. Exp: 我惊呆了/他惊呆了 Hope this is helpful