I will choose Dragon Story !
Why ? For the following reasons :
- we can have more than 1 nest (limit is 5), good thing when you try to speed the breeding
- we have 7 farms , that make easier to feed dragons to Epic .
- expansion need maps requested from neighbors
- we got also expansion from mining but limit for island part is 999 , when in FFS you can not have more than 70 runes
- we can also mine for dragons parts (once all parts gathered, the crafting House will craft the dragons)
- mining bonus are bigger (in DS, max food found in mine is 1000 apples and max coins is 100000. In FFS the max is only 500 apples and 2000 coins and they is VERY rare ! )
- we got 3 golds rounds in DS tournaments, in FFS we got only foods. Gems reward is given only when you hatch the prize
- Epic Treasure dragons give 5 golds per day and there is 8 different ones. In FFS, Treasure animals give about 1 gem per day!
- some dragons can do golds quests, food quests, maps quests
- there is a trading House to trade duplicates dragons
- there is a crafting portal to craft new dragons
- sometimes we have the spin wheel (some chances to get new dragons)
And last reason :
There is a wall in Dragon Story where we can leave message for neighbors !