As presented in 3.5e, the difference in weight appears to accurately reflect that the True Giant (a Hill Giant) is a larger, stronger, and much harder to kill creature than an Ogre that isn't a True Giant (though of Giant Class/Type). The Giant has 400 pounds of bigger/denser...
The alignment specified in a monster's stat block is the default. Feel free to depart from it and change a monster's alignment to suit the needs of your campaign. If you want a good-aligned green dragon or an evil storm giant, there's nothing stopping you. Some creatures can have any...
New beasts were added, "Beast of the Earth" and "Beast of the Air" which are significant improvements over many individual beasts of challenge 1/4 or lower. These new options allow a Ranger to use one stat block to represent any number of beast appearances, providing more versatility for t...