What is the difference between Wyrm Works for Pathfinder and Dungeons and Dragons 5th Edition?
Basically it’s the same fundamental differences between the two games themselves. At their cores, both Pathfinder and D&D 5e draw from similar D&D 3.0/3.5e rules. But each has their own modifications. So, there are those obvious differences.
As far as classes go, on the Pathfinder side, they are not too different than what is available currently in Pathfinder. We do limit some class choices and there are some slight modifications to existing classes. This is done mostly to fit the Dark Sun setting and also to bring it into “modern” or near future tech.
On the 5e side, again similar small changes were made to some of the classes to fit with the Dark Sun setting. However, the biggest change is with adding Psionics. Psionics have not been officially introduced into 5e as of yet (writing this on 12/15/2017). However, there is the Mystic class and its psionics introduced via Unearthed Arcana. It’s still in “play test” mode, but it’s fleshed out enough that
So why force psionics into 5e?
Well, that’s mostly Dark Sun’s fault. Psionics are a major part of Dark Sun and the setting wouldn’t be the same without it. So it works well with Pathfinder since psionics are already introduced, but we had to adapt for 5e until they are officially included.
Combat is not too different from the base systems. Both systems have some rules for modern/futuristic combat and they are close to what we’ve come up with. But in playing completely different systems (e.g. Rifts, Shadowrun, Cyberpunk), we wanted to incorporate a bit more detail as there is in those systems. So modern, or firearm, combat is essentially ranged combat, like with a bow, but rapid fire rules for modern and futuristic weapons were added. For more detail, see Firearms/Modern Weapons.
Modern and Future Tech
This is something that straddles both systems. Again because of their similarities with d20’s being their base for skills/ability checks and having to reach TNs (Target Numbers) or DCs (Difficulty Checks), it is something that could “overlap”. The skill name and some effects might be slightly different, but the overall flow is the same for both systems.