I don't think, either, Mormons nor Orthodox Christians believe that we can be saved by "works" alone, so that is not really the crux of the disagreement, between these two factions.

Here is the difference, as I see it.

Orthodox Christians believe that faith alone is the saving principle. Works spring from faith, but do not add to salvation.

LDS believe that faith and works are inseparable (two sides of the same coin) and, therefore, works do contribute towards salvation. There really is no salvation (in the Celestial Kingdom, at least), unless there is also obedience through works.

Does this properly represent the crux of both sides of this argument?