Force conduit armor or inferbal twilight?

Hi all, In a matter of linutes, i just acquired 2 incredible pieces of arlor. One has force conduit, damage resitance to slashing piercing bludgeonin, and strength hits 1d6. 17 CA. 1000 gold.

The other, crafted by daemon, has 18 CA. Sparks 1D4 fire dmg when hit and only damage reduction of piercing. Yet it is worth 3200 gold! I see the lore reason (rare material) but not the gameplay one, it is not 3 times better. So i was wondering if I would do well to sell the expensive one and keep the other, given it gived more dmg resistance and more damage?