Both actions can be tuned nicely. I have a 25-2 and a Redhawk. Both have spent quality time with Arkansas stones and Wolf springs. The resulting double action pulls are very similar.
The Redhawk has more weight for the recoil to push around. That will calm things down a bit.
There is a difference in single action pulls. The Smith can be a bit lighter due to its separate trigger spring. The Redhawk uses a single spring action. That isn't a major concern in this case. It's not a good idea to have an ultra light trigger in a heavy knock around gun with stiff recoil.