Since they have the exact same composition, that makes little sense.
Next year will be important for the Presidential coin series. If any of our living ex-Presidents wants to be a part of the series, they have to die next year to be eligible for the final set to be issued next year.
The US Mint claims that they used tarnish-resistant coating due to complaints with the Sacagawea dollar coin.
As for the Presidential $1 Coin program, it seems to be almost dead at this point. It's only around for collectors at this point.
To be honest, at this point, I'd consider giving Reagan the dime (as many conservatives seem to want) if we got FDR on a new dollar coin that replaced the dollar bill. I don't like the idea of Reagan on our currency, but I'd rather our coins and bills make sense.