Comparing my 83s and 97s side by side, the 83s are tighter and more accurate. I ordered a 97/22 a while back and when the gun came in I was not satisfied with the 20 yard groups they fired with the gun. So I sent it back, they returned the gun telling me accuracy was with in spec and if I wanted rifle like accuracy I should have ordered the mod 83 silhouette gun. Who buys a $1600.00 pistol and doesnt expect rifle like accuracy? On my 97/22 and 44 special the cylinder has a touch of play and the 83s do not even after many many rounds.
Someone told me once the 97s were designed for cowboy shooting and thats why they are not as tight as an 83. Based on my gun to gun comparison, the 97s are not held to as strict of tolerances as the 83.
If you want the full FA experience go with the 83. If you want a lighter all day to carry gun go with the 97. For the 97 I prefer the 44 Special and for the 83 I prefer the 475L, assuming you reload.
Take Care,
Scott