as Mr Vene said. its a coin-toss.
the choice depends on the fight that you are doing and what kind of stats that you need. if you need/would prefer Effective health then the Tusk-guard is what you would use, loaded with 15 stam gems. Similarly, the tankatronics gemmed with the eternal earthstorm diamond are good for the avoidance and as the fine posts above mine state, the SBV gained from the meta is very subjective on what gear you are using and what you SBV is sitting at.
all in all, an interesting debate