The R8 is a fine gun. If you like a lighter gun, then by all means shoot the R8.
The scandium revolvers from Smith didn’t seem to stand up as well to heavy competition use compared to stainless guns. Like Alec above, I also had a 327, mine was the JM, which is even lighter than the R8s, and personally I found it too light to shoot minor as comfortably as a steel gun.
I know everyone says that lighter guns transition faster, and technically in a scientific sense they do, but I have yet to see anyone prove that at the range. What I do find useful for the lighter gun, especially in steel challenge, is the repetitive movement of drawing the gun in practice doesn’t take as much toll on the shoulder and elbow as a full weight gun does.
You can port the barrel on the R8, but porting does almost nothing. Looks cool though. But the gun can’t go backwards to stock, and it’s difficult to sell that gun one day if you aren’t committed to it.
I say shoot the R8 for a season or two and compare it to the 627. See what you like and don’t like. I think everyone I know ends up using the R8 for steel challenge and has 627s for minor and major loads.