Man, I tried to write the company name, model and year with four of my typewriters on consecutive lines of a single sheet of paper to show you cats the difference in print quality and fonts, but I have to say that is easy as pie to line up text with manual typewriters but nearly impossible to do with my electrics. Needless to say, I got so mad on the 20th attempt that my cats are now hiding from me.
But what this experiment taught me is that the print quality is all over the place. The Hermes Rocket from 1950 has the worst quality but is great to type on. The winner is a tie between the Olympia SM9 and the Nakajima AE-710 (modern electric). Both print dark and sharp, but the manual is going to have fluctuation in darkness because, well, it's a manual.
And for font, the 1971 SM9 and 1950 Hermes Rocket have nearly the same font, and so do the Brother EP43 from 1984 and the Nakajima which is still in production today. The fonts are all a variant of courier, even the 1950 model, and the earlier ones are a thicker more bold font. The modern ones use a very thin and modern version (whodathunkit?).
So yeah, though I love the Nakajima as my current daily driver (5-10 pages a day), I have to say that the manual typewriters are much much much easier to use and way more accurate.