What is an overview of Protestant explanations of the difference between dead faith and perfect faith in James 2?

In James 2:17-22 (KJV) it reads: > 17 Even so faith, if it hath not works, is dead, being alone. > > 18 Yea, a man may say, Thou hast faith, and I have works: shew me thy > faith without thy works, and I will shew thee my faith by my works. > > 19 Thou believest that there is one God; thou doest well: the devils > also believe, and tremble. > > 20 But wilt thou know, O vain man, that faith without works is dead? > > 21 Was not Abraham our father justified by works, when he had offered > Isaac his son upon the altar? > > 22 Seest thou how faith wrought with his works, and by works was faith > made perfect? From the Protestant perspective, what is the difference between "dead" faith (as described in verses 17 and 20) and "perfect" faith (as described in verse 22)? For example, how do you tell them apart, and what are the outcomes of these different kinds of faith? (Related ) Edit: Since different Protestants believe different things, an overview of the different viewpoints, and which denomination believe them.