For 12 awg and larger, you need a pair of professional cutters, not some cheap imitation. I have had my Exelite flush cutters for better than 25 years and have been using them on a regular basis. Now they cost me about $30.00 or so from MCM Electronics Supply way back when, so I would think that a good pair that will take the abuse that you are going to put them through with that large wire are going to be that or higher these days. I have never even heard of either brand that you mentioned, but if they are made from high quality tool steel, then they will be just as good as any other "name" brands.
By the way, from what i have seen, a decent pair of cutters will cost the same if not more than a jeweler's saw. You really don't need a jeweler's saw anyway. They make a hacksaw blade handle that the blade sticks straight out of one end so that you can cut freely without the bow of the saw getting in the way. I have one of these too and if I remember correctly, it was only about $10-$15 and came with several blades. Use the finest, and thinnest blades you can find for these a they take out a lot of metal. It does leave a nice flush cut on both sides that match almost perfectly though. ood luck with whatever decision that you come to.
Billy ;o)
Beady Billy by Pam.
I yam wut I yam and dats all wut I yam. ~Popeye~
Wish for the best, expect the worst, and be happy to meet somewhere in the middle. ~Me~