Ubuntu is upstream to Linux Mint and with that, I saw Linux Mint is lightweight since it has unnecessary bloatwares removed which we had in Ubuntu. Ubuntu Gnome takes 780MB of RAM in idle usage while Linux Mint with Cinnamon takes around 440MB RAM in an idle state.(Please note these are rough figures just to convey an idea) I want to know out of curiosity what are the things removed that makes Linux Mint so lightweight.
Update 1: I don't mean to start any holy wars of the most lightweight distro available in the market but what I intend to understand is the reductions done by the developers to make a derived distro lightweight.