Their outfits were very similar but Kryptonian culture was completely different, between Brainiac, the criminals, how the parents acted, etc.
It's kind of the cartoon in a nutshell. For all it seemed to take from the ten years prior, most of that stuff was just brought back into the reboot in the first place. Intergang and the huge Kirby influence came in the 90s but started with Jimmy Olsen in 1970. The art deco city of tomorrow came to the comics later, based on the cartoon. Wolfman swears by his own take on Luthor foremost, but Byrne would cite things from the golden age, where Luthor was a mob boss. Hackman hardly played a scientist and Maggin also asserts his own hand in creating Lexcorp... so it's like you can say the Clancy Brown Lex was an evolution (realizing all his scientific prowess and cunning could bring, becoming less hands on) that could have occured without the comics following Man of Steel.
I was a little disappointed in what came about because of that. That raw, grounded aspect that just seemed to disappear was what I liked and I see that a lot of people tried to reinstall those feelings later. One of my first comic experiences outside of the regular publishing line was the Man of Tomorrow Archive series, and I was distinctly and immediately let down that the first encounter with Braniac felt nothing like what I'd read from before or since. It's like that raw grit went over to Marvel with its Spider-Man.
And this may just be me again, but I call it Earth 1 to separate the older stuff from the graphic novel series. I have to admit that as tough as it is for me to enjoy the 50s and 60s at times, the fact that "Earth 2" always comes back and "Earth 1" is just accepted as having turned into the main line makes me wish for a set of spin offs like Sacred Knight suggested.