[@Masterkeun]It's not a different timeline thing, though.  Both settings are connected by the Warp/Realm of Chaos, and always have been ever since 40k's conception.  The link between them seems to wane and strengthen at times, but the fact remains that they both run under the exact same mechanics.

I [i]could[/i] drag out my copy of Liber Chaotica right now but I feel like that would be a bit overkill.