I feel like I'd need to test each in a dungeon environment to see which I'd prefer. One seems like it would be good if you're having trouble surviving and the other going even more glass cannon.

I always have trouble comparing potential upgrades so often just take both in dungeons and compare how they feel. The dummies won't always be good for that since you may want to see how you're surviving.

If it's like Ball Lightning build with most armor are unique, should use the right side. Can't really choose defensif affixes and aspects from unique, so get as much as possible from other parts