I looked at those screen shots. The language is similar but it’s not verbatim. The is itself is just the usage of the same framework. Business logic can’t be copyrighted. Is it too close? I agree. Does it cross the legal test. I wouldn’t waste my money on a court battle.

I wasn't talking about a specific case, and "UI" is more than a single page. To be specific, I'm referring to the sum of text (incl. translations), graphics and layout on the entire product/application/etc.

I agree the screenshots in the specific linked case - if that's all there is - are nowhere near enough.