The first attack happens in 2012, which may be changed to 2013 for the sake of its release. The movie is then set in 2025 (also up for change), so it's not like they were able to make these defense systems overnight. The screenplay weaves in the history of this "war" while explaining the trial-and-error scenario they faced when trying to defeat the kaiju. Given the fictional scenario, the screenplay definitely evokes a pretty realistic take on how the world would respond to such a threat. The robots themselves are semi-realistic in that they do not move that fluidly and have a limited amount of ammunition to work with before having to engage physically.
So far the only thing dissimilar to Robot Jox is that in this movie, they use the robots to fight aliens. In Robot Jox, they use the robots to fight internationally instead of having huge wars.
Both robots are semi-realistic and have limited amounts of ammunition, and are also armed with blunt objects for hand to hand combat.