I have fired them side by side and prefer the Mauser much more than the Mosin because of the ergonomics of the Mauser. The bolt operates much easier/better for me, especially from the bench. The safety is also easier to use on the Mauser and the overall length (the M91) of the Mauser makes it much easier to handle/maneuver.
The Mauser went on to be come a highly successful and copied action used by many companies and countries all over the world. I'm not aware of the Mosin having any commercial success and their military contracts were to states with no other options (many puppets).
For me, it's the Mauser hand's down.
He who dares wins.
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