Noise wise? Compare an open header big block to a honda civic. My 243 A bolt is extremely loud, and in a " no hearing protection" hunting situation, I'd prefer a 338,300 win mag or my ported 45-70 guide gun on the ears. (Trust me, I've done it with a bunch of different calibers. its hard to put in hearing protection when a deer is running through the woods by you

)
For vermin, of my 222, 22-250, and 243, the 243 win is by far the loudest. Powder and bullet weight doesnt seem to make much of a difference either.
the 222, and 223 are much quieter for pest hunting in populated rural areas.
The 243 carries a bunch more thump downrange than the 223, and is a pretty good fill in for a deer gun. the 223, not as much, but possible.
The 223 is much cheaper to shoot but both have a tonne of factory ammo avaliable.
As for mag systems, the browning system gives you the best of both worlds. Both my 22-250 and my 243 are Abolts.