Log info for map tiles in Civ like game

Hey All,

I'm building a small civ-like game, and I had some design issues I could use some advice on.

I want to track stats and info of each map tile, so I'm making a public class called TileInfo.

1) Does it make more sense to attach the HexInfo script to the Prefab so that's it prepped ahead of time, or should I attach a Script object to the Tile when it's created? Does it make a difference?

2) If I want to save the state of the object Tile Info, does it make more sense to save the info on those tiles to a serialized object or to an external data store, like a JSON/XML file?