The newer Sako Finnfire and Quad rifles that they are producing today are their any differences in the actions as far as being able to drop 1 or the other in the same aftermarket stock? It looks like the newer Finnfires have the interchangable barrels as the Quad does but is their an actual difference in the action? I see that the older P94 Finnfires do not have the quick barrel change as the new one,s they are producing but do the P94 actions have the same foot print as the new Quad actions to?