One other interesting difference between these two games:
* In Morrowind, the game prefers not to limit the player. For example, early on you can find a consumable that briefly raises one of your skills by 1,000 points (when the normal limit is 100). Furthermore, if you find what looks like a possible way to exploit the game mechanics, Morrowind will probably let you, without providing any resistance.
* In Oblivion, if you try to exploit the game, the game will put up a lot of resistance; the game has mechanics to prevent the player from exploiting it too much (though they didn't catch all the exploits). Sometimes this comes at a cost; fortifying a skill above 100 won't usually provide a benefit, and Fortify Alchemy doesn't actually do anything except increase a number on your character sheet, for example.