Michelin Latitude Tour 225/65R17 100T with “720 A B” UTQG is not the best from Michelin for the size just based on specs. If you check consumer surveys from TireRack.com, you’ll find it ranked #10 out of 28 in Crossover/SUV Touring All-Season Tire category. “Winter/Snow Performance” scored only “Fair” at 6.4, and “Would You Recommend?” also scored “Fair” at 6.5.
For comparison Michelin Premier LTX 225/65R17 102H with “620 A A” UTQG looked better on specs other than treadwear, ranked #1 out of 28 in Crossover/SUV Touring All-Season Tire category. “Winter/Snow Performance” scored “Good” at 7.7, and “Would You Recommend?” also scored “Good” at 7.8.
Even General AltiMAX RT43 225/65R17 102H with “700 A A” UTQG looked better on specs except treadwear, ranked #3 out of 44 in Grand Touring All-Season tire category, scored “Good” at 7.8 in “Winter/Snow Performance”, and scored “Good” at 8.1 in “Would You Recommend?”.
With 4 years and 42,700 miles of usage, no wonder you feel different in winter weather performance as your Michelin Latitude Tour is not that good for winter to start with.
Not all All-Season tires are created equal. Like Unobtanium said, better tires, are better tires. Period.