I'm planning to use OSR modules like Caverns of Thracia, Keep on the Borderlands (and new material also as Vornheim) and so on in a open table project I'm running.
I'm not sure whether using Labyrinth Lord or Lamentations of the Flame Princess, and I'm asking you to point the difference between these two systems.
A friend of mine told me that LL is terribly organized. I know that LotFP has no monsters listed but it's no problem because I can take them from other sources. I also know that LotFP is weird fantasy, but this is visible in the related material, not in the main rule book.
I'm referring to the last art-free editions (LotFP 2013, LL 4th release Sept.2009).
What about compatibility with OSR (and old) material like the modules I cited?
Best Answer
Most retroclones are very similar. Personally, I use many of them interchangeably, including content from Swords & Wizardry, Labyrinth Lord, LotFP, AD&D, and more. They are so similar, conversion is rarely necessary and it is very simple when it is. So I wouldn't stress compatibility.
Some Considerations for Choosing:
If you're not, both systems are free and very similar. I'd say skim through them both, pick the one you like better, grab anything you liked from the other.
Further reading
We have a question with a brief overview of many of the more popular retroclones, but answers don't go into a lot of depth. And an in depth one but it's between Swords & Wizardry and Labyrinth Lord.