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.
No one was taking it seriously back in January-February. I am not convinced she would've acted sooner. The entire western world was painting it out as China's problem and not even thinking about the possibility of it ending up in their own countries.
I can mostly picture the GOP standing up to her like they did all through Obama's 8 years and telling her to fuck off with anything she would want to do and they absolutely would be the loudest voices leading the charge about how bad she'd be handling it.