Played and loved HOMM 1 thru 4,, 5 was a big disappointment to me.., the Castle setup is now boring, slow and confusing, and the game plays out very sluggish compared to the first four games, HOMM was always a quick,fun time for strategy gamers and that is gone to me...
King's Bounty plays out like a RPG , no campaigns or scenarios, and done in real time (except for combat) . It strength is in the RPG elements but also adds great visuals and options in it's turn-based combat as compared to HOMM..
It's differences are that you can't accomplish a full game in one sitting and only have 3 characters to choose from and that I think that hurts it's target audience ( HOMM fans ) and replayability. Maybe a good Expansion pack will help..
I enjoy playing it but will hold my final judgment till I totally play out a character..