As the day when backers will choose which system's version to get approaches, I think it would be better if we could know in advance whether there are any differences between versions, and make an informed choice.
Those could be technical differences, such as "The Switch version has a max of 720p while others can run at 1080p", as well as anything that might affect gameplay, such as console versions using motion controls optionally while the PC version won't have any. Basically, any difference at all that could be important to someone when it comes to choosing a version.
People who buy the game after it comes out will have reviews and other reports from people who have played it in order to figure out which version works best for them, so it would only be fair if backers did too.
Has Playtonic said anything about possible differences at all? I don't know if they read this forum.