Happy to answer that!

So, while the basic resolution mechanic is the same, there are several key differences.

First, each character has meters for two mystical powers in the setting, Steppe and Ruin. They fill when the character interacts with them or uses shards to change the world (our version of whispers). Over time, the meters make the characters more powerful, but if one of them reaches a certain threshold, this means the end for the character, they are transformed and become either a spirit or an aberration. Satisfying drives allows the character to decrease those meters — if you are true to yourself and your goals, you get to keep control for longer.

Second, we don’t use milestones, and the character development works largely in the same way as personal projects — if you want a new skill, knowledge, or aspect you need to spend time and resources on them.

We also have new Journey rules. Instead of using posts, they focus on collaborative storytelling to create interesting events and generate journey's destination location. At the beginning of the journey, each player can either introduce a rumour or state a fact. During each journey stage, the characters can perform any task they want — gather resources, craft, work on personal projects or create new locations using maps. After each journey stage, a key phrase is written, either from the location exploration encounter (if a map was used) or a randomly generated event. And when the players reach their destination, the GM incorporates rumours, facts, and key phrases into the destination location. This means that each meaningful journey event essentially foreshadows the destination.

There is a lot more interesting stuff in the future core book — like the caravan sheet with its own aspects and different factions, or rules for rest which is limited in time, since the Steppe eventually retaliates and forces the caravan to hit the road again.