Wik
First Post
Here's what I mean. A dice pool uses a pool of several dice of the same shape and is usually rolled against a difficulty number. For example, the World Of Darkness is this style. For every dot in a Stat and skill, the dot represents one d10 and the standard difficulty is 7. If you have a DEX of 3 and a Firearms of 2 that's five d10s to roll.
The original Star wars used d6s.
Does WEG Star Wars really count as a "Dice Pool" system by your reckoning? I would consider it to be more of a "variable die" system that only happens to use one type of die - you're adding together all the dice for your result, after all. Also, later versions of the d6 system added in hit points and a bunch of other "Variable die" traits.
For what it's worth, I prefer any system where there are few modifiers to rolls and where actions can be resolved quickly. Doesn't really matter what dice I roll to get there.
Also, hit points do not equal variable die mechanics. There are some variable die games that use "health levels" (savage worlds), and there are dice pool" games that use flat hit points (Shadowrun 4e pretty much does this). Some games that use hit points do set up a penalty/"Death Spiral" as you get hurt (the new d6 games, for example, or Serenity). And so on, and so forth.
The definitions here are good, but I think they only apply to base mechanics - you can't really infer that a game is going to have/is more likely to have any specific feature based entirely on the die mechanics of the game.