I'm not saying in general the Chief worst than the FAS, just for that build I used is not good choice. On the FAS I used 2x Gauss and 2x Shard, but on the Chief 3x Shard, and that's a big difference. After that I put back the 6c Bi-wave and switched to 3 Gauss and I ended with ~80% hull after a fight. It's a good ship but for face-hull tanking a Cyclops the FAS was better, +1 guardian weapon is a big difference. That's all.