2 Guns are obviously better than 1. Since there isn't much difference whether it's 2 or 1, the game is much tougher with only 1 gun as enemies focus on you, and you only have 1 gun, less ammo, less health, less opportunity to survive a mistake. The final boss was cake walk with 2 guns.
For those that never tried dual wielding, you should!
For those that never tried dual wielding, you should!