I will try to answer some of the questions which I know of leaving out the rest of the questions for the experts here.
How do coin exchanges on the dark web differ from regular ones found on the regular web?
This is a trade secret of exchanges. I cant say anything here.
Are they shut down by cops vs the regular ones?
Of course they are. Darkweb nets are not invulnerable and you will find these news commonly about police raids on darknet tumblers, exchanges, marketplaces - shutting them down.
Do they both have more or less the same operating system like pc vs apple???
They are more likely to use Linux distros here. Apple is shit when it comes to vulnerabilities for hackers and windows is also pretty vulnerable.
what kind of coin exchanges operate on the dark web?
This you need to do your own research on.
