Don,
I assume they are both wide triggers? Which do you prefer? If you like the smooth better, you can grind and polish the ridges off of the grooved one.
If you like the grooved one, there's lot'sa sources for obsolete Ruger parts.
The worse case scenario is to find a set of transfer bar conversion parts from a 3 screw Super Blk Hk; they have the wide triggers. A lot have been removed by people restoring Rugers back to the way they should be. You can find them cheap at gun shows or on-line. They will all be blue but strip the blue off with naval jelly or polish it off, remove the transfor bar extension with a hacksaw and file off the bump where the return spring plunger contacts the back of the trigger.
Check the trigger sear fit in your hammer notches; usually fine though, and voila, you have a grooved trigger that looks like stainless that fits your gun.
Hope that helps,
