Originally Posted by keesio
What is the difference between a flare tower and an upgraded fire tower w/slow burn? Sounds like they do the exact same thing (fire + slow).
The difference is that a fire tower w/slow burn is created from a basic turret, is impassable, and can attack all cells around it.
A flare tower operates more like a mine, as is can be walked through, and only attacks units that are on it's tile. Plus it's a lot cheaper.
A few more things about the flare tower: you never have to reload it, it will continue to burn and slow for the entire game (as opposed to teleporters and mines). It only attacks one enemy at a time, so if a mob is going over it, only 1 will be burned/slowed.