A. Yes but they can all bust which was your only stated criteria.
B. Disagree. Burrows is better, Higgins about the same, Sbisa worse. But all 3 are guaranteed NHLers and none of them out up "great points" (hint: just like Hanzal).
If you want to make an argument for trading Virtanen for Hanzal I'd suggest making a better argument than "guaranteed NHLer > Prospect that can bust" next time.
And for the record I wouldn't consider trading Virtanen for Hanzal in a million years. Hanzal does absolutely nothing for this team today except potentially block Horvat for a couple of years. And by the time this team is contending again Hanzal will be in his early/mid 30's and even worse than he is today.
If we did want Hanzal for some strange reason we could easily get him for Brendan Gaunce and a 3rd round pick. Wouldn't even consider guys like Virts, Boeser, McCann, Shink, Corrado, Demko.