Although I do not own a Heym single or double. I have had the opportunity to look, handle and shoot a 88b (my wife's) a beautiful well made, well balanced rifle. I have handled and looked at, but not shot a 89b .470 again a well made, well balance rifle. I do believe the .470 Heym is a little on the light side. Actually a little lighter than a .450-.400. With about a ten thousand dollar difference in price I believe comparing the two are comparing apples with oranges. Which one will still be in good nick 100yrs from now, like my old George Gibbs. I vote for the Heym 89b.