"Integrated features and stuff" I assume can be accomplished on other browsers using extensions / add-ons?
To be fair, extensions do take up a good bit of memory in chrome (as does chrome itself; every tab is a new process), but it's totally worth the speed, the nice, clean and simple look, and not having the entire browser crash when one tab goes down. FF doesn't use that much less memory either.
Not in particular, no.
It has a pretty intuitive resource sniffer, you have a integrated notepad, you have the ability to pop-up flash stuff and resize it (especially useful with Youtube), you have a translate button, a screenshot button, you can split your screen in 2, a very useful ad blocker that works better than adBlock extension, you can have information display at the bottom bar, you have resizing options (ctrl+scrollwheel for other browsers) visually at bottom-right corner (ctrl+scrollwheel still availible), you have mouse gestures (there's a add-on for chrome that sucks really terrible that does this) that I fond extrmeely useful, it's a cloud browser, your account stores bookmarks, saved items (if you want to), settings, it has a really nice history, integrated RSS feed that's really nice to use, shortcut names (for example I can make it so that if I type in bl it gets me to the blockland website, though I think chrome has this feature too?), has 2 integrated render engines, pretty interesting aero-like skin system (you can change skins really quickly and easily customize it), very good developer options too; reader mode, night mode... and a lot of other features. The pop-up video can also be carried to desktop.

Too many features to list, I am pretty sure I screwed up somewhere but yeah.
Regarding memory usage it is a bit of a down-low, but it shouldn't be a problem in general for our computers, same case as Chrome.