"My thinking is that the total would've been on his W-2 if alive."

Maybe the amount on the NEC, sure. One would be the Granting (-NEC) and one would be the Vesting (-Misc) events.

The granting date is available as basis, but your vesting date seems to be the same, perhaps because of a death clause. Perhaps they sold some stocks to pay backup withholding on the NEC? A -Misc might be used to show the difference between the vested basis and the sales price for generating the cash for withholding. You stated the widow got stocks, so there would be a difference in number of shares vested vs transferred.