The "Hunter" grip frame is the same as the Super Blackhawk "dragoon"-square back trigger guard grip frame, except the trigger guard is rounded. They accept the same Super Blackhawk grips. The "Bisley Hunter" is, of couse, different, and accepts only the Bisley grips.
Blkhawk73 has given you the lowdown, otherwise. And as Lloyd points out, ONLY the factory 4 5/8" and 5 1/2" Super Blackhawks were furnished with standard Blackhawk grips, and the New Vaq's and Anniversary guns share with each other a modified XR-3 gripframe.
I will also mention that there is the very rare "long frame" early Super Blackhawk, but those are not the subject of this discussion.