No. Qt and C++ Builder are very different. Qt with Qt Designer is much closer to wxWidgets with wxFormBuilder than C++ Builder, but from my experience so far (i am working with Qt+Qt Designer at day job and worked with wxWidgets and wxFormBuilder at previous job) Qt Designer feels like an alpha product at best when compared to wxFormBuilder.

It is interesting that Qt as an API feels more polished, but the designer is barebones whereas wxWidgets as an API is a bit more clunky but the designer is much more polished (wxFormBuilder is the most common one, though there is also wxSmith which is a commercial designer that is supposedly better - though i never used it myself). In comparison at least, wxFormBuilder does have its own warts.

Though you use both in essentially the same way you'd use MFC with Dialog Resource Editor in Windows 3.0 - just with a bit more features and an easier API. But the core ideas behind the workflow remains the same.

In C++ Builder, even the original version from 1996, is much easier to work with because you design the UI and assign the handlers in a visual way. You are also working with live objects instead of stand-ins (when you create a control or other -nonvisual- component, you compile it into a DLL and the IDE loads and creates an instance of that DLL that you are editing through the rich RTTI it has - this relies on extensions to Delphi/C#-like C++ language). Your form is serialized as a resource inside the executable and deserialized when it is instantiated.

The IDE uses RTTI (remember that this is richer than C++'s regular RTTI) to manipulate the objects, create event handlers (just double click a button or click on a menu and the IDE will create the methods for you - update the header file, write the method body, associate the handler with the event, etc). When you drop a component in a form, it will automatically add any necessary header file #include's at your code (later versions of C++ Builder will also automatically add any necessary includes if you use any function the IDE knows of - like a stdlib function or a function from another file).

In general the IDE will do most of the work for you, you focus on the "meat" of your applications and any busywork/pumbling/boilerplate is handled by the IDE.

I have heard that QtCreator does provide something similar, but from the very little i've used it, it looks that these "whispers" come from people who haven't really used (or understood) C++ Builder as it feels more like how Visual Studio integrated the Resource Editor that back in the day used to be a standalone application inside its UI but still acts as if it was a separate application, than a really interwoven integration like VCL (C++ Builder/Delphi's framework) and C++ Builder have. But truth be told, i have used QtCreator very little to judge properly - i'll need to do a more in-depth experiment (though again, i never had to do that with C++ Builder or Delphi).

(as a sidenote, in general i have a bias against anyone that only focuses on the form designer aspect of C++ Builder/Delphi when comparing it to some other supposedly similar tool as the form builder is only the tip of the iceberg that only works as well because of the rest of the iceberg beneath it)

Now if modern C++ Builder wasn't such an overpriced DRM-infested PITA it'd be nice. Though like with Delphi, if $whoeverownsittoday decided to release a cheap (similar to their mid-90s prices) DRM-free version (especially on a box, though i'm ok with an installer or ISO i can keep on my own media) i'd (most likely) buy it instantly.

Though their community editions are free (but with a bad license that says you can use it only if you make up $5k annually and still needs activation that can go away at any time they feel like) so if you just want to play around they're fine.