I have no idea if Real Robots are equivalent to Super Robots, I really don't have time to stat some up and I know this has been playtested so I'm going to assume that if there was a big discrepancy that someone would have hopefully said something. Off-hand Super Robots look better but I could be missing something related to arsenal space/hardpoints since I haven't gotten there yet.
My group has commented on this before. Thanks to accessories, Real Robots massively beat out Super Robots in basically every stat. I've got
spreadsheets that show, for example, AC and To-Hit bonus, and the difference (specifically for AC, though To-hit is also consistently higher) is laughable. As an example, if we look at level 12, a super robot will have AC 35 and To-Hit bonus of +19. Most tier 3 real robots (unlocked at level 9!) with relevant accessories have 41 AC and ~+19 To-Hit. The DR on the reals is lower (topping out at 24 at that level vs the 37 of a super), but this is on a level just before a grade improvement, which makes it one of the least efficient levels possible for a real. If we look at the next level, when Reals gain grade 4, the Supers will only improve their To-Hit bonus by one (to +20), and have the same AC (35), while the reals go up to ~+21 To-Hit, and have AC ranging from 35 at the lowest (Huckbein mk3 Boxer) to as much as *52* (Randgriz).
The issue that I have with the whole thing is that some of the named real robots (not the generics, those are fine) have superior stats to everything else in the system, even among reals. As an example, if we look at the top tier of real robots, we get the Astrangant and the Alegrias. If you select accessories for them to maximize their AC/To-Hit, you end up with +33 To-Hit and 79 AC on the former vs +35 To-Hit and 53 AC on the latter. That's more than a full d20 of difference between their ACs for only 2 points of To-Hit.
As a side note, this leads to a gripe I have with the spirit Strike where it's a Real Robot spirit, but all pilots can only hit Reals on a 20 without it, thus making Supers the inferior choice because they have to pay more to be able to reasonably do damage.