I think Terminator is far superior to T2.............the story is hundreds of times better, the only advantage T2 has over the original is the large budget and FX technology that had been invented.
Now.......to sequels that are actually better than the original.
I think Desperado is superior to El Mariachi (havn't seen OUATIM yet)
I think Book of Shadows is better that The Blair Witch Project
I think Friday the 13th parts 3,4,7 are all better than the first
I think Empire Strikes Back is better than Star Wars
I think Rocky II is better than Rocky
I think Silence of the Lambs is far superior to Manhunter
I think Bill and Ted's Bogus Journey is better than Excellent Adventure
dawn of the dead is arguably better the night of the living dead
day of the dead is arguably better then dawn of the dead
two towers is better if not equal too fellowship
T2
teenage mutant ninja turtles 2 is better then the first
thats all
PS. Book of shadows is garbage. has no redeeming qualities whatsoever, the first blair witch at least had a heart and had some unique qualities, book of shadows was just rushed out to capitalize on the firsts success.