Dell Update vs Dell Update for Windows Universal

They both are the same utility app with the same functions.  You will need to install only one.  Use Dell Update for Windows for your Windows base machine.

Hi @AdrianeS :

Dell Update v4.x is an "old-style" classic Win32 application that is no longer supported.  The "Supported Operating Systems" section of the release notes <here> for Dell Update v4.6.0 (released Aug 2022) show that this application is compatible with Win 8.1 and higher, and I believe you would still be able to use this application if you had an older Dell machine with a Win 8.1 OS, but it would not receive any further feature or security updates.

The Dell Update for Windows Universal v5.x app is a "new-style" UWP (Universal Windows Platform) app that is still supported, and as Chino de Oro suggested, this is the app you should install if you have a Win 10 or higher OS. If you read the "Important Information" section of the release notes <here> for the current Dell Update for Windows Universal v5.2.0 (released Jan 2024) it says "Dell Update Classic interface is not supported from version 4.8 and later. If you have Dell Update Classic, Dell Update version 4.8 UWP is installed." 
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Note that Dell Update for Windows Universal v5.2.0 (Dell-Update-Windows-Universal-Application_GT6WW_WIN_5.2.0_A00.EXE, released 31-Jan-2024) is the UWP app currently offered on the support page for your Dell G7 17 7790 at https://www.dell.com/support/home/en-us/product-support/product/g-series-17-7790-laptop/drivers, but the support page for other Dell computer models may recommend a slightly different edition of the Dell Update UWP app (e.g., Dell Command | Update for Windows Universal v5.x).
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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.4291 * Firefox v124.0.2 * Microsoft Defender v4.18.24030.9-1.1.24030.4 * Malwarebytes Premium v4.6.12.323-1.0.2309 * Dell Update for Windows Universal v5.2.0 * My Dell v2.2.6.0