What's the difference between Noah Webster and Samuel Johnson?

I thought Webster created the first dictionary? Did Samuel Johnson create the dictionary or did Webster created it? ConfusingWhat's the difference between Noah Webster and Samuel Johnson?
Neither one of them created the first dictionary, but Samuel Johnson created a dictionary before Noah Webster. The oldest known dictionaries were Akkadian empire cuneiform tablets with bilingual Sumerian鈥揂kkadian wordlists, discovered in Ebla (modern Syria) and dated roughly 2300 BC.

Samuel Johnson (18 September 1709 [O.S. 7 September] 鈥?13 December 1784), often referred to as Dr Johnson, was an English author who made lasting contributions to English literature as a poet, essayist, moralist, literary critic, biographer, editor and lexicographer. Johnson was a devout Anglican and committed Tory, and has been described as "arguably the most distinguished man of letters in English history".[1] He is also the subject of "the most famous single work of biographical art in the whole of literature": James Boswell's Life of Samuel Johnson.[2]

Noah Webster (October 16, 1758 鈥?May 28, 1843) was an American lexicographer, textbook pioneer, English spelling reformer, political writer, editor, and prolific author. He has been called the "Father of American Scholarship and Education." His blue-backed speller books taught five generations of American children how to spell and read, and made their education more secular and less religious[citation needed]. His name became synonymous with "dictionary," especially the modern Merriam-Webster dictionary that was first published in 1828 as An American Dictionary of the English Language.