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over 4 years ago from Simon Gustavsson, Designer at Heydays
When you make a change in Sketch, you can update the assets is Principle by reimporting the artboards. It will retain everything, as long as you don't mess around with the naming of things.
Changes can also be deleting a layer, or adding a layer. Adding two layers into a group. Etc... All of these are trivial changes that are usually chaotic in prototyping tools.
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They're both pretty equal, and both not perfect. I stopped using them because I rarely need interactions so they were quite expensive for me, but here's what I think:
First of all, they both suffer the same main problems (Correct me if anything has been fixed in the past year, I would love to know): lots of bugs, changes in design break everything, no support for all types of layers in sketch
Other than that, these are the main differences between them:
Principle -
Pros: Easy to learn, has a timline, fastest way to create a prototype
Cons: gets messy in larger projects
Flinto -
Pros: More organized, Better focus on specific animations
Cons: no timeline