OK, class, some "straight up" information is needed here!
4-5/8" and 5-1/2" Super Blackhawks are fitted with a steel or stainless steel Single-Six/Blackhawk sized grip frame.
The 4-5/8" Supers have non fluted cylinders but the 5-1/2" versions do indeed have fluted cylinders.
The classic Super Blackhawk grip frame has the "square backed" trigger guard and is significantly longer than the Single-Six/Blackhawk style.
Here's an image of the Single-Six/Blackhawk's XR3-RED grip panel setting on the Super Blackhawk "Dragoon" style grip frame. Look close and you can see the Super's grip area is significantly larger. (One can also surmise where WBR got his design for the XR3-RED!!!)
OK, now, the Hunter series, as opposed to the Bisley Hunters, are fitted with the Hunter grip frame which is the SAME as the Super Blackhawk "Dragoon" except the trigger guard is round and doesn't sport the 90° corner.
Wide Triggers? Across the board since the advent of the New Model. Most Super's came with serrated triggers but, IIRC, that may have been changed in the recent decade. I don't know for certain.
Flash must have a gun with a "swapped on" grip frame since the KS-45N is produced with a stainless XR3-RED sized grip frame.
flatgate