Coincidentally, I’ve been looking at these as I’m due a new phone soon.
The flip 5 style has no value apart from gimmick as far as I can see. It goes in your pocket in a smaller height which might be of use to some people but that’s about it. Same volume of phone, same size of screen.
The Fold 5 style makes a lot more sense to me. You get a phone the same size as a normal one (roughly) but then a screen twice sized normal (roughly). I’m sure not everyone is interested in that, but there’s definitely a practical value there for some.