Mormon doctrine: “For we labor diligently to write, to persuade our children, and also our brethren, to believe in Christ, and to be reconciled to God; for we know that it is by grace that we are saved, after all we can do.” (2 Nephi 25:23 - Book of Mormon) In other words, do all you can or else the Lord will not be able to save you. That is clearly works salvation.
Christian doctrine: For by grace, you have been saved through faith, and that not of yourselves; it is the gift of God, 9 not of works, lest anyone should boast. (Ephesians 2:8,9 - Bible) Enough said.