Doc,
WELCOME.
As the guys said, you could flip a coin, buy one and go kill critters.
I'm not particularly a purist, so the Winchester name means not a thing to me. And, these days, the nomenclature "M-70" is just a shadow.
Stainless/Synthetic is a very good thing. I have killed a crapload of big game animals with rifles so-built. Wood/blued is pretty, but by going SS/Syn, you are basically insuring reliable function in the field.
I look at my wood stocked/blued steel rifles at home, then go kill sh1t with SS/Syn rifles.
Of the two choices, I'd absolutely choose the MRC, if only because of the traditional (read that; time proved) M-70/Springfield trigger. It is the superior rifle, without a doubt.
Again, welcome to the Campfire,
Steve