What's the differences between QT6 and 5 and standard version?

[InstaZDLL]

Please tell me what's the differences between these:

qbittorrent_enhanced_4.4.1.10_Qt5_x64 44.1 MB
qbittorrent_enhanced_4.4.1.10_Qt6_x64 52.9 MB
qbittorrent_enhanced_4.4.1.10 40.2 MB

[LarLei]

qbittorrent_enhanced_4.4.1.10 40.2 MB = 32-bit

https://www.qt.io/blog/qt-6.2-vs.-qt-5.15-the-feature-parity-comparison