
That's the difference of the two SC generator, as mentioned on the website.
But I upload the same custom.zip to the generators, the returned .EXE differ only on the MSRC4Plugin.dsm embedded.
The first generator provides the MSRC4Plugin.dsm dated 2009-08-03.
The second provides the MSRC4Plugin.dsm dated 2014-04-01 & digital signed.
I don't find any difference related to the "request UAC on start".