Back in the day my friend had this game for his CPS3. I wanted to play it so he explained how to change the game from Second Impact to Warzard. The load takes about a half hour, no joke.
Played Warzard...did the swap back to SI, didn't switch back to Warzard.
So, I guess I can say that I don't like it as much as Second Impact, but that's not a very profound statement since SI is awesome as hell. I should probably give Warzard another chance.