I made half meter prints from 35mm CMS 20, and looked with 10x Loupe - and no grain. It is absurd how fine grained this film is.
CMS20 really shines in 35mm. I recently semi-retired the Leitz V35 and boxed off my good old trusty Magnifax 4 with BW condenser head and family of Rodenstock Rodagons from 50mm up to 135mm, so that I can easily do above 1 meter from 35mm CMS20.
I've shot some MF back in 2012 when they released it in that format but its a different beer.
It was not my intention to say that you can´t make a fine print out of a 35mm negative. Of course a real master printer will get a more decent result from a 35mm neg than a beginner would yield from a 645 neg. But it´s all the limitation of the film. Most excellent lenses (and this is the level we are talking here) can yield resolutions that are beyond what most films can resolve. And this is why a doubling or tripling of the film area will inevitably lead to more resolution. Same with the Adox film Darko mentioned. It is true that when put in a 35mm camera, one can achieve stunning resolution. But put the same film into a 120 camera (and it is available as 120 as far as I know) and one can achieve even higher resolution.
Zeiss Superachromat 5,6/250 is one of the very few MF lenses to burst a bit under 250lp/mm on Agfaortho 25 or Adox CMS20.
So, good luck shooting the above lens @ wide open, since the further you go down, the more diffraction gets hungry.
@ f/8 in MF world you should light a candle if you get something like 120 lp/mm.
In 35mm world, especially RF, there are hundreds of lenses, capable of reaching the 400lp/mm diffraction limit of white light @ f/4.
For a typical Leica prime glass, say Summilux 50mm, you get excellent corner to corner even at f/2,8.
So, it boils down to how good are your printing skills.