1 is just a little dated in comparison. It is still a very very good game though. The beginning is a bit slow but it opens up big time.
I would say 1 is a lot dated, even compared to 2.
Like you said still a good game, but if you go back and play it, the combat is pretty bad and the graphics are certainly a step down, even the PC version feels quite dated. It's kinda odd actually how dated it feels for its age.
It's a must play, though, especially if you want to do the trilogy.