Which is more worthwhile for runes?

So I was wondering what is more beneficial in terms of my runes. I am only focusing on quints and seals. Which one is better:

A) 27 armor @18 + 146 HP @18 B) 20 armor @18 + 216 HP @18

The differences would be one giving me 7 more armor but with 70 less health, or I gain 70 extra health but lose 7 armor. Which one is better generally speaking?