It's hard to say really, the original was made quite well. The CGI is just a little off now, but that's only because it's more than 10 years old. It was structured and produced very well (only downfall was the repetition of Mary Jane being captured and rescued in every part). Toby Maguire didn't really play Peter Parker 100% the way he is meant to be, but the layout of the films were good (excluding part 3).
The Amazing Spider-Man has average CGI, but better than the original, the story line is also closer to the original Spider-Man idea. The characters are pretty much equal, though Andrew Garfield plays Peter Parker better than TM. You get a better Peter Parker feel through AG's performance. Although you Willem Defoe, James Franco and J.K. Simmons performances from the original is just classic. Good thing about the remake is the nice modern feel through dialogue.
The original Spider-Man 1 was a good starting and developing part, the second was just brilliant and the third actually destroyed the series.
The reboot Spider-Man 1 is pretty much like the original, good starting point, the second also was very good a bit much going on, but good nonetheless.