tinyE: Actually the 1st five TRs let you save anywhere.
phaolo: Surely not the first TR on PS1.
I think he was referring to the PC version. It had save anywhere, PS1 version had restricted saves. I liked the PC version better for that because it allowed me to try all kinds of dangerous stuff, to check whether I was able to reach some ledge by jumping. If not, then just reload.
After all, the game was about exploration, and save anywhere helped with that.
phaolo: Btw, the pc version was so-so.. I don't think that it even had hardware acceleration.
It had a few new sections, though.
I think overall the PC version was superior to the PS1 version. It didn't originally have 3D accelerator support on release, but it was added quite soon in a patch for various 3D cards (3Dfx Voodoo included). The GOG version has 3D acceleration too, it uses a 3Dfx emulator for it. This makes the graphics much sharper and cleaner than on the PS1 version with pixellated and twisty&floaty textures.
The only advantage for the PS1 version I can think of was that it had some additional music for some parts of the game while PC version used just some ambient sounds (echoing dripping water drops etc.) for those sections for some reason. However, there are ways to add that "missing" music to the GOG version, instructions in the Tomb Raider subforum.