A government stopping its own projects versus rescinding a private companies permits after it is 70% built for no reason are not similar at all.

Is there a difference between the US government cancelling its own project to build a wall vs. stopping another company from completing their own wind power project?

That's not even remotely comparable. First, that was a federal government project. Second it was a government project that was entirely created by the previous President by declaring an emergency and using his authority to spend money to deal with emergencies.