dogeddie: A warrior gets 3 strength to start, but at subsequent level ups he has no differences than a mage or ranger?
Correct. You can distribute the stat points as you wish when you level up, and besides the initial distribution there is no difference between a warrior, mage or ranger. For example, a warrior that switches to a bow and starts boosting dexterity could be pretty much identical to a ranger that put a few points into strength (ie for the healing rate boost) after a few levels (other than the starting skills; though you can eventually unlearn your skills, for a price, and re-invest the skill points). There are equipment bonus that give stat points (while equipped), charms, stat books (which give a free stat point) and possible stat points from Mindreading, so really the initial stat distribution isn't going to matter after the start of the game.
Dragon Knight Saga FAQ/Guide