The original (old style) 85c trigger is a little thicker and has less curved radius. Shadow line is similar to original 85c curve, a little more rounded on the edges. The new 85c trigger is thinner and has more curve than the original 85c.
The black recurve and 75b/85b triggers have the most curve. Only difference in the two is the color.
It's not in the pic, but I believe the 97B has a trigger profile similar to the original 85c. The 97BD has the the black recurve I believe.