In my family we have a CVA optima pro, 1 TC Omega, 1 Winchester Apex, 1 Beartooth Mag and 4 TC Emcores all these are 50 calibers. They all shoot just as good as each other. Once we found what load and bullet they liked.
My favorite is the Omega, but that wasn't on your list . The cheapest is the NF Beartooth Mag and it shoots right along with the others. With the exception of the cheap ram rod ( that you can replace for about $15 with a good one) there is nothing wrong with it. It is a clone of the Optima by CVA.
The CVA Optima has a unatural look to it's butt stock and my daughter just has a hard time loading it when she needs to seat a "tight" 3rd or 4th shot because the drop in the stock is so severe. I don't have that problem but I weigh 200#s more than her.
IMHO most all break action MZ are pretty much the same...a breech plug,a primer, a charge/bullt ,and a barrel with a scope mounted on it. I can honestly say I don't see a few hundrd $$ difference in my Omega and my Optima or it's clone the Bearthooth. 140ob