love the flame throwers and a cool theme.  i don’t understand  the difference between flying towards water vs grass, and how a crashed airline can be a good theme. i can’t resist the first Immelmann drop and the key hole on x flight. in my opinion x-flight wins until you bring in wild eagle

The Swarm is going to have great theming, something neither of the others offer.  There is even mention of flame throwers being incorporated into The Swarm’s theming.  Plus, the Swarm’s first drop will be head first towards the water.  I do think X-Flight will have a stronger/more forceful layout, but the Swarm also has its own merits as well.