The 54 is a work of art. Glides like butter and locks up like a bank vault. The 64 is a more utilitarian design. Light weight and simple. Both actions have been utilized in Olympic shooting for several decades. The accuracy is in the barrel. There are 64 actions that will shoot with 54's, given the operator is up to snuff. For plinking/benchrest the 54 is the easy answer. If you plan on carrying the rifle and hunting game the 64 is the way to go. I have several of both variety & like them all.
Scott
