No racial variations in this, sorry, but as it stands, you can make 30 different paladin classes using the one core class in here by choosing one of the five focuses and six dedications. The focuses are chosen at level 1, and determine what core abilities the class grants, the dedications are chosen at level 2 and affect spellcasting and other abilities granted by the class.
Plus you have a lot of other variety through the special abilities - at 5 different times as a paladin levels up, he gets a choice of an ability from a list of 17 special abilities. Effectively, you should never see two PC paladins look the same again, even if both use the same class.
And of course, that's just the Paladin - this book also includes the Knight and Scourge.