I have greatly enjoyed the Retrofit Mod. I tend more toward chivalric combat and economic building with the Mod.
It looks to me that Custom Campaign Mod encourages a more aggressive play with the reduced upkeep charges, stock piling peasant archers free of upkeep, and some free of upkeep units to the castles.
I have played around briefly with Spain in the grand campaign. My Retrofit Mod stategy of Zaragossa, then Cordoba, and then Lisbon has a differant feel to it. I cannot seem to place the differences.
Any comments or suggestions?