Reals generally use understood[by the setting] technology, as spurious [20m humanoid biped is a terrible fucking shape for a 15 ton walker, let alone any combat vehicle. Yes, even for those directly controlled by direct neural interface] as this tech may be. They're built and designed for implementation with military mindsets. Usually they're made dodgy ranged attackers because if you can't be sure you'll just shrug off incoming rounds, cover, stealth and range are good ideas just like they are in real life.
Supers throw in an extra layer of Handwavium, and tend to be [sometimes literally, as we all know from our favorite robot-lion drill-tank bomber train] powered by courage and other emotions. Not that "reals" don't do it often too, but in Supers its assumed in the design, rather than some unexpected plot-moment. Their weapons also tend towards the even-less-sensical, like rust tornadoes or firing off green or pink beams of evolution-radiation or transforming into giant flaming birds that phase through things while causing fatal damage.
Then there's those that straddle the line; like mass-produced 'super types' like the Grungust, "reals" that really aren't like the later gundams [with that much plot-armour...] or Dis-Astranagant, or 'reals' forced to 'ascend' to the ridiculousness of their larger bretheren like the Alt-Riese.