Dienekes' post reminded me of the recoil of that security six I had, worst of any medium frame .357 I've ever fired, worse than an SP101! Part of it was weight and light barrel, but that thing sat really high in the hand and it rolled back violently with hot loads. I put a nylon Hogue grip on it (before Hogue came out with the rubber ones) and the sharp edge of the grip cut the palm of my hand! I had to take a knife and smooth out the sharp edge of that grip. It was not a pleasant gun to fire with hot loads.
Still, the security six is the handier of the two and I, for one, wish Ruger would bring it back as an alternative to the GP. The SP101 is the Ruger I'm looking at for future purchase, though. It's handier than either one and handles recoil better than the Security Six. Wish I could at LEAST get the .357 with windage adjustables on it, though. The fixed sights put me off in a .357 because danged few of 'em hit anywhere close with hot loads to where they hit with a light .38. On my current Taurus, all I have to do is raise the rear sight six clicks for .38, drop it back for .357.