I love SG0 more than the original series, because it elevated the original even more. Also, I find the Sad Scientist a more compelling character.
spoiler
The revived Mad Scientist is just as compelling
On another note, I liked Okabe x Kurisu on its own after I watched the OG, but SG0 made me like Okabe x Mayuri better.
I liked 0 far better but I got to give credit to the original for setting it up so that the strong notes of 0 could hit as hard as they could. That ending of that one episode where they played Lyra still destroys me to this day.