I imagine in terms of medical care access and affordability or welfare stimulus, practically negligible, but in terms of CDC funding, science literacy, public policy, and general preparedness, it would be a whole lot better put together.
So I'd say... 10% fewer deaths? 200K vs. 220K deaths sounds about right.
Plus some of the biggest vectors for spread are nursing homes and meat plants. Places where people are incredibly close to one another for hours at a time. The mask shit definitely didn't help, but it was keeping places open that really fucked us over.