Continental UltraContact 6 (UC6) is much better in terms of the factors that you’re interested in.
Yokohama Advan db v552 is a very good tire, but it’s relatively soft tire and if used on rough terrain, it will get puncture easily and more often.
In addition to this, life span of Continental UC6 is also longer than Yokohama Advan db v552, but it also depends on the way that you use the tires.
I hope it helps.