GF is absolutely better when it comes to the plot, but I'd still say GF 2 is generally better.
TGM, I think Geneforge had just the right amount of people to speak to. You spend most time wondering about what the heck it is all about, true, but every once in a while you meet someone who reveals a bit more. Then, little by little you start to understand the puzzle. Brilliant, IMO.
But then again, I am a fanatic friend of the "castaway-all-alone-on-old-and-mystical-deserted-island" genre.
Anyway, GF 2's plot became obvious far too soon.