It has a lot of new features compared to the older versions.
-There are a lot of new units
-all nations are balanced (for example british have guard-longbows, portugese have besteiros)
-the host has the possibility to activate different extras
-teleporting to the next level now works 100%
-if you lose your king you don't die but get inprisoned
-there are a lot of things to discover, for example a map obscurer or miners that can destroy walls etc.
Better test it yourself!
P.S.: Thanks to Mister SPC for some pieces of advice he gave me in this forum.