I’m putting this in a new post because it ended up being much lengthier than I originally planned. I wanted to clarify that I’m not saying they’re unrelated. I mentioned that I thought the abilities were different in my previous post. I did look more closely and noticed a grid on the Sword World sheet, so I went and looked up how it worked in the fan translation.
In Sword World, your race and background gives you three ability scores: skill, mind, and body. You then roll six scores in order (A, B, C, D, E, F) with different numbers of dice depending on race. You add A and B to skill, C and D to body, and E and F to mind. That yields Strenght, Agility, Dexterity, Vitality, Intelligence, and Spirit ability scores.
In Goblin Slayer, you likewise get your primary and secondary scores from your race, but each primary ability is paired with each secondary ability yielding twelve scores instead of six. The range of values is also smaller.
For example, a dwarf fighter in SW would start with 4, 11, and 5 for skill, mind, and body. You would then roll 2d6+6, 1d6, 2d6, 2d6, 1d6, 2d6+6 for A, B, C, D, E, and F. In Goblin Slayer, you would roll 1d3+2, 1d3, 1d3+2, 1d3−1 for Strength, Psyche, Technique, and Intelligence then combine those with 1d3+1, 1d3+1, and 1d3−1 for Focus, Endurance, and Reflex.
Doing some more skimming, you can start to see the shared DNA in the skill system. They’re both standard value + 2d6 + modifiers. Standard value in Sword World is your level plus your modifier (ability ÷ 6) while it is just your level plus ability in Goblin Slayer. The numbers in Goblin Slayer have been recalibrated since they use different target numbers. An “extremely easy” check in Sword World is 5 while the easiest in Goblin Slayer is 9.
It’s getting late, and I really don’t want to have to read both books without getting any sleep. I would say my post
#21 is off the mark and want to thank
@Myrdin Potter for the nudge to dig into it a bit deeper. I think Di’s assessment that they are “quite different” and Goblin Slayer is a homebrew on top of Sword World seems right. You can see the similarities, but there are also some core differences. I think if one wants Sword World, then Goblin Slayer will get you close, but it’s still its own thing.