Me myself, I picked the basic (buled 'n wood) Mini-14 Ranch Rifle for two reasons;
(1). I'm not a big fan of small-bore/super-velocity rifles....but for my intended uses, I can "make do" with the .223/.5.56 cartridge much better than I could make-do with what I consider to be a rather-crappy 7.62X39 ammo situation.
(2). The basic Ranch Rifle is as cheap as a new Mini gets. Yeah, one can pay extra and get more features...but when ya get down to it, most of them are mostly for the tacticool guys, not for old farts like me. Heck, I'm quite-used to my 13 pound, M1 match rifle....so no one will ever convince me that a standard-sized Mini needs trimmed-down in length, or needs lightened with plastic stock, and what's a guy like me (who doesn't even own a scope) need with a shorten sight radius, a flash hider, or a rail to mount accessories on?
But that's just me.
To address the question possed in the title of your thread;
Back in "skinny barrel" days, I found that most Mini-30's were more accurate than most Mini-14's when both were being used with high quality ammo. That said though, I have not used a new "tapered barrel mini-30, so I don't if that is still the case.
What I do know is that my (582 series) Mini-14 can be counted on to hold a 2-1/2" group with M193 ball ammo, which is a dern-sight better than any of the older Mini-14's that I've used would do.
Hope this helped.
DGW