The Redhawk has lockwork different than the Security Six or the GP100. In fact, it is the only model Ruger makes with that lockwork. It is kind of the evolution of the Security Six, that eventually ended up with the GP and the Super Redhawk. It is a much bigger gun, specifically made for shooting full house .44 Magnum ammo. It has a grip frame, like the Security Six, but it locks up at the cylinder like the GP and SRH. I love the Redhawk, but the grip frame has never fit my hand well, no matter what grips I have tried on it.
gunman42782 - My hand doesn't fit the standard grips on the RH either. I ended up putting wood Hogues on it and they fit my hand much better and spread the recoil better.
Triggernosis - Yeah, they're different, the RH is much bigger. That said, I still like the Security Six series of revolvers, in fact I just finished filling out a trio, a snubby Security Six, Service Six and Speed Six. I'll post pics when I get them all together (last one coming tomorrow).
I have my RH set up for hunting in thick brush, I put a set of ghost ring sights on it for quicker target aquisition in thick cover.
So they are different in size and caliber, but I wouldn't say one is better than the other, they are used differently.
I like Rugers but if you want a double action .357 for woods carry buy a Smith.If you want a Ruger get a single action for strength and weight!
If you can find one get a Smith 4inch Model 66 or if you plan on carry more that shooting get one of the smaller frame guns.
The J-frame Model 60 presently comes with a heavy 3 inch barrel and some years back Smith made the Model 60-18.The 60-18 has a 5 inch barrel but it also has the lock.The 60-18 is a great carry gun BUT it is not exactly a plinking gun!!!!