Is Hammett a better writer than Fitzgerald?

Still enjoying Dashiell Hammett's last novel (934), "The Thin Man," about 1/3 of the way through it, mainly for the sharp dialog, particularly the repartee between Nick and Nora Charles, and the very retro, cool debonair tone, the evocation of a New York that is no more and maybe never really was, when people stayed in posh hotels and lived off room service, with waiters unfolding tables right in the room, and lots of drinking at every hour, and phone calls and visitors with calling cards and nobody seemed to have to work very hard at anything - except, think of the difference between this world that Hammett evokes and the very worthless world that Fitzgerald, in a slightly earlier era, evoked - see my recent posts in which I hammered day after day on Tender is the Night - and what's the great difference between Fitzgerald's Dick Diver and Hammett's Nick Charles? Diver does nothing but betray his wife and hurt people, Fitzgerald constantly telling us that he's a great psychiatrist, but never showing us - even the glimpses of Diver at work are weak and perfunctory, a great psychiatrist would have psychological insights (perhaps about everyone but himself) throughout the novel, but Diver has none; but Hammett's hero, a retired detective (rich now by marriage and doesn't have to work) is constantly thinking and acting like a detective and is drawn back, against his will, into a peculiar case of murder and infidelity. We really see what makes Nick's mind work and how it works. Line by line, page by page, the writing is sharp and serviceable and funny and not embellished. I would never say the writing is as fine as Fitzgerald's but Nick Charles is a stronger, more credible, more fully drawn character than Dick Diver because he has a place in the world and a professional life.