EVGA GTX 780 Classified is better because of its ACX Cooler. Its clarity rate is 36.8 GPixel/s whereas Asus has 33.5 GPixel/s. High texture rate 147 GTexels/s whereas its 134 for Asus and better clock speed 1150 MHz, asus has 1046Mhz
The only advantage of poseidon is its water-air cooling that's all !!Due to its better cooling you have a better performance over a reference card.