Difference between Qt dll files placed in MinGW and QtCreator directories

[MasoudCS]

Hello,

I'm using Qt in windows7. the Qt version is 5.3.2 .
Here is my question:
I'm trying to deploy an application with all it's necessary dll files. but in installed directory of Qt (C:\Qt\), assuming I need Qt5Widgets.dll, I have two choices:

1) C:\Qt\Qt5.3.2\Tools\QtCreator\bin\Qt5Widgets.dll (Size: 4.16 Mb)
2) C:\Qt\Qt5.3.2\5.3\mingw482_32\bin\Qt5Widgets.dll (Size: 5.61 Mb)

What's difference between these two dll files? what should I notice to choose between them?

PS: I already know that Qt5Widgetsd.dll is debug-mode-compiled-version of the actual dll file.

Thanks

[john_god]

AFAIK, QtCreator is compiled with MSVC compiler, even if you have downloaded the Qt mingw version, so dll's in C:\Qt\Qt5.3.2\Tools\QtCreator\bin\ are there only to run QtCreator. So if you're using the mingw compiler you should defenitly use the ones from C:\Qt\Qt5.3.2\5.3\mingw482_32\bin\