Not much to add to that!40SWXDSHOOTER said:I bought a Tactical for USPSA shooting, because I didn't want to do any mods to the service model that I carry. I sent the Tactical out and had some work done on it, trigger, finish, and sights.
As for as the accurcy I think that upgrading the sights is the way to go. I didn't see much defference between the two until I put Dawsons Adjustable Fiber Optics on the Tactical, and it was so much better that I put Dawsons Adjustable Night Sights on my carry gun, and now they are back to being the same.
The biggest advantage I see in the Tactical is that it is a little heavier in the front, and maybe not quite as snappy as the Service, but you would have to judge for yourself. And you have more optitions when changing spring weights with the Tactical.
If you are going to try all of them out just use the same ammo in all of them, and pick the one that you like the best.
You could just buy one of each, I'm up to four .