Mauser vs Moisin Nagant
Having owned a number of both, I far and away prefer the Mauser. When comparing low budget milsurp rifles, there isn't usually a whole lot between them, other than my experience is that smooth bolt throw is the exception with the MN. Of course, old worn Mausers can have a bit of bolt wobble, so I think it kind of a wash. Good shooters of both are accurate, poor ones aren't, and the outside finish isn't any guide as to if it will shoot well, or not.
For the MN lovers out there, enjoy them, they are a good military bolt action. But Mausers are good rifles. I have or have had Mausers converted from milsurps in calibers ranging from .22-250 to .458Win Mag, which have equalled or surpassed commercial mass produced sporting rifles.
The same sort of thing is not practical (or even possible) with the Moisin Nagant. You can replace the stock, work over the trigger, even scope them, and they still are what they are. A clunky bolt and an awkward safety do not to me beauty make.
For a bad car analogy, a Mauser is like a VW that you can turn into a Porsche, if you want. A Moisin Nagant is a ...Studebaker. It gets you around, but you can't really do anything much else with it.
So, if you are talking milsurp rifles in issue trim for blasting up milsurp ammo, either is ok. MNs are cheaper today, because former combloc countries need cash, and they have a lot of old rifles for sale. 30-40 years ago, Mausers (and Arisakas, even Springfields) were cheap and plentiful. In those days MNs were scarce, and rather expensive, and ammo was difficult/impossible to find, cause the communists wouldn't sell us any.
I say Mausers are the better rifle, and sporting rifle design supports this. The style of locking lugs and the magazine design are Mauser, or derived from Mauser on the majority of bolt action sporters. Just because it doesn't have a large claw extractor, and/or has a spring loaded ejector doesn't mean that it isn't a Mauser at it's roots.
Moisin Nagants and SMLEs are fine military rifles, and can be made into passable sporters with enough effort, and I own several of each. But Mausers are just the best. Even the US Govt built our version (Springfield and Enfield)of the Mauser, not the MN, or the SMLE, or anybody else's design.
Not an exact copy, but the Mauser features are clearly evident. In over 100 years, nobody has come up with a significantly better design, although some features have been improved.
That didn't happen with the Moisin Nagant, nor the Carcano, nor the Lebel, not the SMLE, or even the Mannlicher. To me, that says alot.