by selwyth
The card system is (fiddly) randomization with replacement while a dice system is (easy and aesthetically pleasing) randomization without replacement.I don't care for the fiddly overhead of the card system when dealing with combat, since you either don't card-count (so it's pointless) or you're a fun murderer if you do; but I like the card-counting for diplomacy and quests.
If I were the Runewars king, I'd have dice for combat, and mill a Fate Card for every die rolled.