getter77: For those that have sunk time into both games, is it worthwhile to purchase the original as well as the sequel or does the sequel simply dwarf it overall in term of the gameplay, replayability, etc?
Granted, I'm somewhat tempted to purchase both just to show GoG support, but still...
Some prefer the sequel, though there are many that feel that the original is superior.
It's very much up to personal preference, I think the best way to describe it is to compare it to something like Civilization II to Civilization III, the precursor is more simplistic and accessible, but it's tighter in its mechanics and somewhat easier to understand and jump into, the sequel has more features, and though all of them are well done, it can be overwhelming, and some people believe that the extra additions bog down the pacing of the game.
I say you try them both out, starting with the original, it's a good enough game that you should try it regardless of there being a sequel that has more meat to it, it's just a damn good experience.