Trust me, after finishing the hard campaign and doing it again on normal for the other princesses, the biggest difference is the aggression of the PC on the RTS map.
I've seen it react to goldfish sized gaps in my naval blockade to still take rearguard bases away from the front. The damn transports managed to land too with like, 10 hp left.
Pace is relentless too. I can win 3 skirmishes against a Hard PC and still not take a breather as it throws a counter to my surviving forces right away. Against normal, its a done deal when I win the first clash.
