Sadly, I can't compare it to the ER1912 or vintages of that era. However, I can give it a similar shave in feel to a GEM Bullet Tip or even to a slightly lesser degree the GEM push-button. I have the + plate and I don't consider it nowhere near aggressive. Blade reveal is minimal but, it actually offers an effective cutting ability that is closer to a Post War Tech. Smooth and comfortable but, still on the milder side of things. If a higher rate of efficiency is your game, this particular size gap will leave you lacking for more. If you're familiar with the Clog-Pruf and even the MMOC, the Vestige razor isn't even remotely close to them in this configuration. Perhaps the ++ & +++ plates may get one there but, I cannot say with certainty that it will. From what I have read on multiple shave forums, the most aggressive Vestige set up still falls short of the MMOC quite considerably. I can neither prove nor disprove that statement.
Sorry that I could not give you a more concise or definitive answer to your question.