One of the hallmarks in terms of Marvel versus DC has always been an attempt to have harder science fiction as opposed to softer (meaning that its science fiction is more based on fact.) DC characters rarely use anything resembling real science. With the exception of Batman, many of whose inventions in comics were followed not long after with a replication in real life, DC has traditionally taken a scientific concept and without really understanding it used it as the basis for one of its characters. In fact ironically one of the most intelligent of DC scientists, Ray Palmer, has harnessed the powers of White Dwarf matter which make absolutely no sense. In terms of Marvel though, science is explained in a more realistic way. To be fair there is no scientific way to explain a character like Cyclops for instance, with the ability to fire energy from his eyes, but even with this leap in science, the character is still tied to at least some science (the mutation is caused by evolution, the visor is based on electromagnetism). And while there are some characters in Marvel that fall into the typical implausible origins (like with any power granting radiation - radiation mostly just kills living things) there are some who are based primarily off of science - Reed Richards, Hank Pym or Amadeus Cho. The most famous of these (at least in terms of science) is undoubtedly Tony Stark, who uses science more in terms of its application to technology (that is to say he is an engineer). Is DC trying to edge its way in on this with the new 52 though? The new Mister Terrific series is quite similar to Invincible Iron Man in tone and content, and really in character behaviour. Mister Terrific has always been portrayed as a genius inventor, but now that he has his own series, it seems to be focusing on just how smart he is (much like in Iron Man) as well as making the occasional quip about the stuff which he doesn't know. Captain Atom is is similar but not as similar, similar for attempting to rely on harder physics to explain the character, courtesy of Doctor Megala, while also offering the same powerhouse levels of superheroics that Tony Stark does. Overall it seems as though the characters are being written almost to compete with the dominance of Iron Man in the science sub-genre of comics which Marvel seems to have an almost monopoly on. For Dc who has always relied more heavily on more powerful characters and less ties to science it will be interesting to see if it works.