Arcanum:
- Smaller worldmap, less cities, less locations in general. A smaller game in general, more like Fallout 1 in size. Say, Shrouded Hills, Dernholm, Black Root, Tarant, Caladon. Maybe Quintarra. Few, but very well-handcrafted dungeons.
- Real-Time/Turn-based combat is cancer, kill that hybrid shit with fire. BUT, Arcanum is a big reason why we know so.
- Turn-Based, tactical combat. You can command followers.
- Better balance:
- Guns are strong and penetrate armor, but take long (APs) to reload and anything that's not a long arm is imprecise (as were the weapons of the time). Also, there are real bullet mechanics with proper modifiers and separate ammo, as in Fallout games. Early guns are propa muskets using powder and shot, later guns are Far West/Late victorian repeaters and revolvers. Shotguns are, well, shotguns.
- Melee weapons a bit less cheesy. Makes you wonder why people use guns in Arcanum
- A character system where Dexterity/Strength are not the supreme stats.
- Bows are not machineguns, their main advantage is easy to obtain ammo, no need to reload, indirect attack and the possibility of using exotic trick arrows.
- Magic has more of a price. (like random effects and spells going awry)
- Magic can miss. Seriously, fuck that shit.