I've got a 450/400 and have become enamored with what Craig Boddington calls "the lower 40s." I also have a pair of McMillan CZ 550 Magnum stocks sitting next to my safe awaiting barreled actions. I am also a big fan of Ruger Model 77's and, having a 9.3x62 I feel no need for a 375 Ruger, but the 416 Ruger looks very interesting. How to reconcile these things?

My question is this: Do the 416 Rigby (in the CZ550) and 416 Ruger (in the Ruger Alaskan) perform their tasks differently enough to justify, with the minimum level of practicality required by rifle loonies, owning both? If so why? If not, why not?