The CK mod uses physics almost identical to the stock game, and thus, it is better balanced. But it lacks some of the tracks, has outdated visual quality and almost completely misses mid-season changes, and sometimes it crashes.
DM's mod has top quality visuals (graphics and models), it has all the tracks, has unique pyhsics, andfollows the midseason changes in color schemes, driver lineups and most of the car part upgrades (different 3D models). But it is balanced for AI vs. AI races, the game sometimes can't control the physics and sometimes it crashes.
I, personally would DM's mod all the time, because it's much more pretty, accurate and unique, but you have to be prepared to spend a lot of time with balance, bugfixing and difficulty adjustments.
DM 95 in particular is by far superior to any other 95 mods, but unfortunately it wasn't completely finished until racesimulations went down. The current issues I found:
- Doesn't follow drivers change in graphics (has no helmets for substitute drivers - other DM mods have) - I already fixed this for myself

- For some unknown, and very rare reason, it CTD on Buenos Aires. But it's very rare and you likely can make a whole weekend without any issue.
- Physics aren't completely finished. Cars are sparated into "tiers": Williams-Benetton, Ferrari, McLaren-Jordan-Sauber etc. Only the engine power is different. - I'm already working on this one too.
- AI can't keep the fastest cars on track in Buenos Aires - Already taken care of.
So it's not perfect, but I'm on my way to fix whatever I can, and then it will be hyper-awesome. Now it's just awesome
