by Krissou
For me, the other difference is :- the nomad can change every type of terrain into home terrain (did not depends of a number of spades)
- the giants can only use two spades. So they can use one spade on two different terrains or two spade in the same. And they were not oblige to change the terrain in home terrain. And, if the terrain need three spade to be change in home terrain you will not have your home terrain (you need to make an other action to use one more spade).